diff --git a/src/Duration.zig b/src/Duration.zig
index f725fbd..9fafa90 100644
--- a/src/Duration.zig
+++ b/src/Duration.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 const abi = @import("abi.zig");
-const temporal = @import("temporal.zig");
+const t = @import("temporal.zig");
 
 const PlainDate = @import("PlainDate.zig");
 const PlainDateTime = @import("PlainDateTime.zig");
@@ -8,11 +8,13 @@ const ZonedDateTime = @import("ZonedDateTime.zig");
 
 const Duration = @This();
 
-pub const ToStringOptions = temporal.ToStringRoundingOptions;
-pub const ToStringRoundingOptions = temporal.ToStringRoundingOptions;
-pub const Unit = temporal.Unit;
-pub const RoundingMode = temporal.RoundingMode;
-pub const Sign = temporal.Sign;
+_inner: *abi.c.Duration,
+
+pub const ToStringOptions = t.ToStringRoundingOptions;
+pub const ToStringRoundingOptions = t.ToStringRoundingOptions;
+pub const Unit = t.Unit;
+pub const RoundingMode = t.RoundingMode;
+pub const Sign = t.Sign;
 
 pub const RoundingOptions = struct {
     largest_unit: ?Unit = null,
@@ -20,15 +22,6 @@ pub const RoundingOptions = struct {
     rounding_mode: ?RoundingMode = null,
     rounding_increment: ?u32 = null,
     relative_to: ?RelativeTo = null,
-
-    pub fn toCApi(self: RoundingOptions) abi.c.RoundingOptions {
-        return .{
-            .largest_unit = abi.toUnitOption(temporal.toCUnit(self.largest_unit)),
-            .smallest_unit = abi.toUnitOption(temporal.toCUnit(self.smallest_unit)),
-            .rounding_mode = abi.toRoundingModeOption(temporal.toCRoundingMode(self.rounding_mode)),
-            .increment = abi.toOption(abi.c.OptionU32, self.rounding_increment),
-        };
-    }
 };
 
 /// Partial duration specification for creating Duration objects.
@@ -44,31 +37,6 @@ pub const PartialDuration = struct {
     milliseconds: ?i64 = null,
     microseconds: ?f64 = null,
     nanoseconds: ?f64 = null,
-
-    fn toCApi(self: PartialDuration) abi.c.PartialDuration {
-        return .{
-            .years = abi.toOption(abi.c.OptionI64, self.years),
-            .months = abi.toOption(abi.c.OptionI64, self.months),
-            .weeks = abi.toOption(abi.c.OptionI64, self.weeks),
-            .days = abi.toOption(abi.c.OptionI64, self.days),
-            .hours = abi.toOption(abi.c.OptionI64, self.hours),
-            .minutes = abi.toOption(abi.c.OptionI64, self.minutes),
-            .seconds = abi.toOption(abi.c.OptionI64, self.seconds),
-            .milliseconds = abi.toOption(abi.c.OptionI64, self.milliseconds),
-            .microseconds = abi.toOption(abi.c.OptionF64, self.microseconds),
-            .nanoseconds = abi.toOption(abi.c.OptionF64, self.nanoseconds),
-        };
-    }
-};
-
-/// Wrapper for PlainDate reference in RelativeTo
-const PlainDateRef = struct {
-    _inner: *abi.c.PlainDate,
-};
-
-/// Wrapper for ZonedDateTime reference in RelativeTo
-const ZonedDateTimeRef = struct {
-    _inner: *abi.c.ZonedDateTime,
 };
 
 /// Relative-to context for duration operations.
@@ -76,14 +44,6 @@ pub const RelativeTo = union(enum) {
     plain_date: PlainDate,
     plain_date_time: PlainDateTime,
     zoned_date_time: ZonedDateTime,
-
-    fn toCApi(self: RelativeTo) abi.c.RelativeTo {
-        switch (self) {
-            .plain_date => |pd| return .{ .date = pd._inner },
-            .zoned_date_time => |zdt| return .{ .zoned = zdt._inner },
-            .plain_date_time => |pdt| return .{ .date = (pdt.toPlainDate() catch unreachable)._inner },
-        }
-    }
 };
 
 /// Options for Duration.total() providing unit and relative-to context.
@@ -96,8 +56,6 @@ pub const CompareOptions = struct {
     relative_to: ?RelativeTo = null,
 };
 
-_inner: *abi.c.Duration,
-
 /// Construct a Duration from years, months, weeks, days, hours, minutes, seconds, milliseconds, microseconds, and nanoseconds.
 /// Equivalent to `Temporal.Duration.from()` or the constructor.
 pub fn init(
@@ -176,7 +134,7 @@ inline fn fromUtf8(text: []const u8) !Duration {
 
 /// Create a Duration from a partial duration (where some fields may be omitted).
 fn fromPartialDuration(partial: PartialDuration) !Duration {
-    return wrapDuration(abi.c.temporal_rs_Duration_from_partial_duration(partial.toCApi()));
+    return wrapDuration(abi.c.temporal_rs_Duration_from_partial_duration(abi.to.partialdur(partial)));
 }
 
 /// Check if the time portion of the duration is within valid ranges.
@@ -236,7 +194,7 @@ pub fn nanoseconds(self: Duration) f64 {
 
 /// Get the sign of the duration: positive (1), zero (0), or negative (-1).
 pub fn sign(self: Duration) Sign {
-    return Sign.fromCApi(abi.c.temporal_rs_Duration_sign(self._inner));
+    return abi.from.sign(abi.c.temporal_rs_Duration_sign(self._inner));
 }
 
 /// Check if the duration is zero (all fields are zero).
@@ -268,8 +226,8 @@ pub fn subtract(self: Duration, other: Duration) !Duration {
 
 /// Round the duration according to the specified options (Temporal.Duration.prototype.round).
 pub fn round(self: Duration, options: RoundingOptions) !Duration {
-    const rel = if (options.relative_to) |r| r.toCApi() else abi.c.RelativeTo{ .date = null, .zoned = null };
-    return wrapDuration(abi.c.temporal_rs_Duration_round(self._inner, options.toCApi(), rel));
+    const rel = if (options.relative_to) |r| abi.to.durRelativeTo(r) else abi.c.RelativeTo{ .date = null, .zoned = null };
+    return wrapDuration(abi.c.temporal_rs_Duration_round(self._inner, abi.to.durRoundingOpts(options), rel));
 }
 
 /// Round the duration with an explicit provider.
@@ -279,7 +237,7 @@ fn roundWithProvider(self: Duration, options: RoundingOptions, relative_to: Rela
 
 /// Compare two durations (Temporal.Duration.compare).
 pub fn compare(self: Duration, other: Duration, options: CompareOptions) !i8 {
-    const rel = if (options.relative_to) |r| r.toCApi() else abi.c.RelativeTo{ .date = null, .zoned = null };
+    const rel = if (options.relative_to) |r| abi.to.durRelativeTo(r) else abi.c.RelativeTo{ .date = null, .zoned = null };
     const res = abi.c.temporal_rs_Duration_compare(self._inner, other._inner, rel);
     return try abi.extractResult(res);
 }
@@ -292,14 +250,14 @@ fn compareWithProvider(self: Duration, other: Duration, relative_to: RelativeTo,
 
 /// Get the total value of the duration in the specified unit (Temporal.Duration.prototype.total).
 pub fn total(self: Duration, options: TotalOptions) !f64 {
-    const rel = if (options.relative_to) |r| r.toCApi() else abi.c.RelativeTo{ .date = null, .zoned = null };
-    const res = abi.c.temporal_rs_Duration_total(self._inner, options.unit.toCApi(), rel);
+    const rel = if (options.relative_to) |r| abi.to.durRelativeTo(r) else abi.c.RelativeTo{ .date = null, .zoned = null };
+    const res = abi.c.temporal_rs_Duration_total(self._inner, abi.to.unit(options.unit).?, rel);
     return try abi.extractResult(res);
 }
 
 /// Get the total value of the duration with an explicit provider.
 fn totalWithProvider(self: Duration, options: TotalOptions, provider: *const abi.c.Provider) !f64 {
-    const rel = if (options.relative_to) |r| r.toCApi() else abi.c.RelativeTo{ .date = null, .zoned = null };
+    const rel = if (options.relative_to) |r| abi.to.durRelativeTo(r) else abi.c.RelativeTo{ .date = null, .zoned = null };
     const res = abi.c.temporal_rs_Duration_total_with_provider(self._inner, options.unit.toCApi(), rel, provider);
     return try abi.extractResult(res);
 }
@@ -309,7 +267,7 @@ pub fn toString(self: Duration, allocator: std.mem.Allocator, options: ToStringR
     var write = abi.DiplomatWrite.init(allocator);
     defer write.deinit();
 
-    const res = abi.c.temporal_rs_Duration_to_string(self._inner, options.toCApi(), &write.inner);
+    const res = abi.c.temporal_rs_Duration_to_string(self._inner, abi.to.strRoundingOpts(options), &write.inner);
     try handleVoidResult(res);
 
     return try write.toOwnedSlice();
@@ -580,15 +538,15 @@ test total {
         const dur = try Duration.init(0, 0, 0, 0, 1, 30, 0, 0, 0, 0);
         defer dur.deinit();
 
-        const t = try dur.total(.{ .unit = .hour });
-        try std.testing.expectEqual(1.5, t);
+        const ttl = try dur.total(.{ .unit = .hour });
+        try std.testing.expectEqual(1.5, ttl);
     }
     {
         const dur = try Duration.from("PT4H5M6S");
         defer dur.deinit();
 
-        const t = try dur.total(.{ .unit = .hour });
-        try std.testing.expectEqual(4.085, t);
+        const ttl = try dur.total(.{ .unit = .hour });
+        try std.testing.expectEqual(4.085, ttl);
     }
 
     {
diff --git a/src/Instant.zig b/src/Instant.zig
index e204f53..e9f7de5 100644
--- a/src/Instant.zig
+++ b/src/Instant.zig
@@ -1,30 +1,19 @@
 const std = @import("std");
 const abi = @import("abi.zig");
-const temporal = @import("temporal.zig");
+const t = @import("temporal.zig");
 
 const Duration = @import("Duration.zig");
 
 const Instant = @This();
 
-pub const Unit = temporal.Unit;
-pub const RoundingMode = temporal.RoundingMode;
-pub const Sign = temporal.Sign;
-pub const RoundingOptions = temporal.RoundingOptions;
-pub const DifferenceSettings = temporal.DifferenceSettings;
+_inner: *abi.c.Instant,
 
-/// Time zone identifier for Temporal operations
-pub const TimeZone = struct {
-    _inner: abi.c.TimeZone,
-
-    pub fn init(id: []const u8) TimeZone {
-        const view = abi.toDiplomatStringView(id);
-        return .{ ._inner = .{ .id = view } };
-    }
-
-    fn toCApi(self: TimeZone) abi.c.TimeZone {
-        return self._inner;
-    }
-};
+pub const Unit = t.Unit;
+pub const RoundingMode = t.RoundingMode;
+pub const Sign = t.Sign;
+pub const RoundingOptions = t.RoundingOptions;
+pub const DifferenceSettings = t.DifferenceSettings;
+pub const TimeZone = t.TimeZone;
 
 /// Options for Instant.toString()
 /// See: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/Instant/toString
@@ -47,8 +36,6 @@ pub const ToStringOptions = struct {
     time_zone: ?TimeZone = null,
 };
 
-_inner: *abi.c.Instant,
-
 /// Construct from epoch nanoseconds (Temporal.Instant.fromEpochNanoseconds).
 pub fn init(epoch_ns: i128) !Instant {
     return fromEpochNanoseconds(epoch_ns);
@@ -112,19 +99,19 @@ pub fn subtract(self: Instant, duration: *Duration) !Instant {
 
 /// Difference until another instant (Temporal.Instant.prototype.until).
 pub fn until(self: Instant, other: Instant, settings: DifferenceSettings) !Duration {
-    const ptr = (try abi.extractResult(abi.c.temporal_rs_Instant_until(self._inner, other._inner, settings.toCApi()))) orelse return abi.TemporalError.Generic;
+    const ptr = (try abi.extractResult(abi.c.temporal_rs_Instant_until(self._inner, other._inner, abi.to.diffsettings(settings)))) orelse return abi.TemporalError.Generic;
     return .{ ._inner = ptr };
 }
 
 /// Difference since another instant (Temporal.Instant.prototype.since).
 pub fn since(self: Instant, other: Instant, settings: DifferenceSettings) !Duration {
-    const ptr = (try abi.extractResult(abi.c.temporal_rs_Instant_since(self._inner, other._inner, settings.toCApi()))) orelse return abi.TemporalError.Generic;
+    const ptr = (try abi.extractResult(abi.c.temporal_rs_Instant_since(self._inner, other._inner, abi.to.diffsettings(settings)))) orelse return abi.TemporalError.Generic;
     return .{ ._inner = ptr };
 }
 
 /// Round this instant (Temporal.Instant.prototype.round).
 pub fn round(self: Instant, options: RoundingOptions) !Instant {
-    return wrapInstant(abi.c.temporal_rs_Instant_round(self._inner, options.toCApi()));
+    return wrapInstant(abi.c.temporal_rs_Instant_round(self._inner, abi.to.roundingOpts(options)));
 }
 
 /// Compare two instants (Temporal.Instant.compare).
@@ -235,8 +222,8 @@ fn optsToRounding(opts: ToStringOptions) abi.c.ToStringRoundingOptions {
     else
         defaultPrecision();
 
-    const smallest_unit = if (opts.smallest_unit) |unit| unit.toCApi() else null;
-    const rounding_mode = if (opts.rounding_mode) |mode| mode.toCApi() else null;
+    const smallest_unit = if (opts.smallest_unit) |unit| abi.to.unit(unit).? else null;
+    const rounding_mode = if (opts.rounding_mode) |mode| abi.to.roundingMode(mode) else null;
 
     return .{
         .precision = precision,
diff --git a/src/PlainDate.zig b/src/PlainDate.zig
index aeb9b72..b4b500d 100644
--- a/src/PlainDate.zig
+++ b/src/PlainDate.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 const abi = @import("abi.zig");
-const temporal = @import("temporal.zig");
+const t = @import("temporal.zig");
 
 const PlainDateTime = @import("PlainDateTime.zig");
 const PlainMonthDay = @import("PlainMonthDay.zig");
@@ -11,10 +11,12 @@ const Duration = @import("Duration.zig");
 
 const PlainDate = @This();
 
-pub const Unit = temporal.Unit;
-pub const RoundingMode = temporal.RoundingMode;
-pub const Sign = temporal.Sign;
-pub const DifferenceSettings = temporal.DifferenceSettings;
+_inner: *abi.c.PlainDate,
+
+pub const Unit = t.Unit;
+pub const RoundingMode = t.RoundingMode;
+pub const Sign = t.Sign;
+pub const DifferenceSettings = t.DifferenceSettings;
 
 pub const ToStringOptions = struct {
     calendar_id: ?CalendarDisplay = null,
@@ -41,8 +43,6 @@ pub const ToZonedDateTimeOptions = struct {
     plain_time: ?PlainTime = null,
 };
 
-_inner: *abi.c.PlainDate,
-
 pub fn init(year_val: i32, month_val: u8, day_val: u8) !PlainDate {
     return calInit(year_val, month_val, day_val, "iso8601");
 }
@@ -104,12 +104,12 @@ pub fn subtract(self: PlainDate, duration: Duration) !PlainDate {
 }
 
 pub fn until(self: PlainDate, other: PlainDate, settings: DifferenceSettings) !Duration {
-    const ptr = (try abi.extractResult(abi.c.temporal_rs_PlainDate_until(self._inner, other._inner, settings.toCApi()))) orelse return abi.TemporalError.Generic;
+    const ptr = (try abi.extractResult(abi.c.temporal_rs_PlainDate_until(self._inner, other._inner, abi.to.diffsettings(settings)))) orelse return abi.TemporalError.Generic;
     return .{ ._inner = ptr };
 }
 
 pub fn since(self: PlainDate, other: PlainDate, settings: DifferenceSettings) !Duration {
-    const ptr = (try abi.extractResult(abi.c.temporal_rs_PlainDate_since(self._inner, other._inner, settings.toCApi()))) orelse return abi.TemporalError.Generic;
+    const ptr = (try abi.extractResult(abi.c.temporal_rs_PlainDate_since(self._inner, other._inner, abi.to.diffsettings(settings)))) orelse return abi.TemporalError.Generic;
     return .{ ._inner = ptr };
 }
 
@@ -129,7 +129,7 @@ pub fn withCalendar(self: PlainDate, calendar: []const u8) !PlainDate {
 }
 
 pub fn toPlainDateTime(self: PlainDate, time: ?PlainTime) !PlainDateTime {
-    const time_ptr = if (time) |t| t._inner else null;
+    const time_ptr = if (time) |tt| tt._inner else null;
     const ptr = (try abi.extractResult(abi.c.temporal_rs_PlainDate_to_plain_date_time(self._inner, time_ptr))) orelse return abi.TemporalError.Generic;
     return .{ ._inner = ptr };
 }
@@ -149,7 +149,7 @@ pub fn toZonedDateTime(self: PlainDate, options: ToZonedDateTimeOptions) !ZonedD
     const tz_result = abi.c.temporal_rs_TimeZone_try_from_str(tz_view);
     const time_zone = try abi.extractResult(tz_result);
 
-    const time_ptr = if (options.plain_time) |t| t._inner else null;
+    const time_ptr = if (options.plain_time) |tt| tt._inner else null;
     const ptr = (try abi.extractResult(abi.c.temporal_rs_PlainDate_to_zoned_date_time(self._inner, time_zone, time_ptr))) orelse return abi.TemporalError.Generic;
 
     return .{ ._inner = ptr };
diff --git a/src/PlainDateTime.zig b/src/PlainDateTime.zig
index b6cfb90..97c7e5e 100644
--- a/src/PlainDateTime.zig
+++ b/src/PlainDateTime.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 const abi = @import("abi.zig");
-const temporal = @import("temporal.zig");
+const t = @import("temporal.zig");
 
 const PlainDate = @import("PlainDate.zig");
 const PlainTime = @import("PlainTime.zig");
@@ -12,11 +12,11 @@ const PlainDateTime = @This();
 _inner: *abi.c.PlainDateTime,
 
 // Import types from temporal.zig
-pub const Unit = temporal.Unit;
-pub const RoundingMode = temporal.RoundingMode;
-pub const Sign = temporal.Sign;
-pub const DifferenceSettings = temporal.DifferenceSettings;
-pub const RoundOptions = temporal.RoundingOptions;
+pub const Unit = t.Unit;
+pub const RoundingMode = t.RoundingMode;
+pub const Sign = t.Sign;
+pub const DifferenceSettings = t.DifferenceSettings;
+pub const RoundOptions = t.RoundingOptions;
 // Type definitions for API compatibility
 pub const CalendarDisplay = enum {
     auto,
@@ -208,20 +208,20 @@ pub fn subtract(self: PlainDateTime, duration: Duration) !PlainDateTime {
 }
 
 pub fn until(self: PlainDateTime, other: PlainDateTime, options: DifferenceSettings) !Duration {
-    const result = abi.c.temporal_rs_PlainDateTime_until(self._inner, other._inner, options.toCApi());
+    const result = abi.c.temporal_rs_PlainDateTime_until(self._inner, other._inner, abi.to.diffsettings(options));
     const ptr = (try abi.extractResult(result)) orelse return abi.TemporalError.Generic;
     return .{ ._inner = ptr };
 }
 
 pub fn since(self: PlainDateTime, other: PlainDateTime, options: DifferenceSettings) !Duration {
-    const result = abi.c.temporal_rs_PlainDateTime_since(self._inner, other._inner, options.toCApi());
+    const result = abi.c.temporal_rs_PlainDateTime_since(self._inner, other._inner, abi.to.diffsettings(options));
     const ptr = (try abi.extractResult(result)) orelse return abi.TemporalError.Generic;
     return .{ ._inner = ptr };
 }
 
 // Rounding
 pub fn round(self: PlainDateTime, options: RoundOptions) !PlainDateTime {
-    return wrapPlainDateTime(abi.c.temporal_rs_PlainDateTime_round(self._inner, options.toCApi()));
+    return wrapPlainDateTime(abi.c.temporal_rs_PlainDateTime_round(self._inner, abi.to.roundingOpts(options)));
 }
 
 // Property accessors - Date fields
@@ -375,12 +375,12 @@ pub fn withCalendar(self: PlainDateTime, calendar: []const u8) !PlainDateTime {
 }
 
 pub fn withPlainTime(self: PlainDateTime, time: ?PlainTime) !PlainDateTime {
-    const new_hour: u8 = if (time) |t| t.hour() else 0;
-    const new_minute: u8 = if (time) |t| t.minute() else 0;
-    const new_second: u8 = if (time) |t| t.second() else 0;
-    const new_millisecond: u16 = if (time) |t| t.millisecond() else 0;
-    const new_microsecond: u16 = if (time) |t| t.microsecond() else 0;
-    const new_nanosecond: u16 = if (time) |t| t.nanosecond() else 0;
+    const new_hour: u8 = if (time) |tt| tt.hour() else 0;
+    const new_minute: u8 = if (time) |tt| tt.minute() else 0;
+    const new_second: u8 = if (time) |tt| tt.second() else 0;
+    const new_millisecond: u16 = if (time) |tt| tt.millisecond() else 0;
+    const new_microsecond: u16 = if (time) |tt| tt.microsecond() else 0;
+    const new_nanosecond: u16 = if (time) |tt| tt.nanosecond() else 0;
 
     const calendar_ptr = abi.c.temporal_rs_PlainDateTime_calendar(self._inner) orelse return error.TemporalError;
     const cal_id_view = abi.c.temporal_rs_Calendar_identifier(calendar_ptr);
@@ -597,10 +597,10 @@ test toPlainDate {
 
 test toPlainTime {
     const dt = try PlainDateTime.init(2024, 1, 15, 14, 30, 45, 0, 0, 0);
-    const t = try dt.toPlainTime();
-    try std.testing.expectEqual(@as(u8, 14), t.hour());
-    try std.testing.expectEqual(@as(u8, 30), t.minute());
-    try std.testing.expectEqual(@as(u8, 45), t.second());
+    const tt = try dt.toPlainTime();
+    try std.testing.expectEqual(@as(u8, 14), tt.hour());
+    try std.testing.expectEqual(@as(u8, 30), tt.minute());
+    try std.testing.expectEqual(@as(u8, 45), tt.second());
 }
 
 test toZonedDateTime {
@@ -635,8 +635,8 @@ test withCalendar {
 
 test withPlainTime {
     const dt = try PlainDateTime.init(2024, 1, 15, 14, 30, 0, 0, 0, 0);
-    const t = try PlainTime.from("10:15:30");
-    const result = try dt.withPlainTime(t);
+    const tt = try PlainTime.from("10:15:30");
+    const result = try dt.withPlainTime(tt);
     try std.testing.expectEqual(@as(u8, 10), result.hour());
     try std.testing.expectEqual(@as(u8, 15), result.minute());
     try std.testing.expectEqual(@as(u8, 30), result.second());
diff --git a/src/PlainMonthDay.zig b/src/PlainMonthDay.zig
index 7f7e2cc..81f47a4 100644
--- a/src/PlainMonthDay.zig
+++ b/src/PlainMonthDay.zig
@@ -1,9 +1,10 @@
 const std = @import("std");
 const abi = @import("abi.zig");
-const temporal_types = @import("temporal.zig");
+const t = @import("temporal.zig");
+
+const PlainDate = @import("PlainDate.zig");
 
 const PlainMonthDay = @This();
-const PlainDate = @import("PlainDate.zig");
 
 _inner: *abi.c.PlainMonthDay,
 
diff --git a/src/PlainTime.zig b/src/PlainTime.zig
index 53fd966..08e8f29 100644
--- a/src/PlainTime.zig
+++ b/src/PlainTime.zig
@@ -1,17 +1,18 @@
 const std = @import("std");
 const abi = @import("abi.zig");
-const temporal_types = @import("temporal.zig");
+const t = @import("temporal.zig");
+
+const Duration = @import("Duration.zig");
 
 const PlainTime = @This();
-const Duration = @import("Duration.zig");
 
 _inner: *abi.c.PlainTime,
 
 // Import types from temporal.zig
-pub const Unit = temporal_types.Unit;
-pub const RoundingMode = temporal_types.RoundingMode;
-pub const DifferenceSettings = temporal_types.DifferenceSettings;
-pub const RoundOptions = temporal_types.RoundingOptions;
+pub const Unit = t.Unit;
+pub const RoundingMode = t.RoundingMode;
+pub const DifferenceSettings = t.DifferenceSettings;
+pub const RoundOptions = t.RoundingOptions;
 
 pub const WithOptions = struct {
     hour: ?u8 = null,
@@ -81,14 +82,14 @@ pub fn subtract(self: PlainTime, duration: Duration) !PlainTime {
 }
 
 pub fn until(self: PlainTime, other: PlainTime, options: DifferenceSettings) !Duration {
-    const settings = options.toCApi();
+    const settings = abi.to.diffsettings(options);
     const result = abi.c.temporal_rs_PlainTime_until(self._inner, other._inner, settings);
     const ptr = (try abi.extractResult(result)) orelse return abi.TemporalError.Generic;
     return .{ ._inner = ptr };
 }
 
 pub fn since(self: PlainTime, other: PlainTime, options: DifferenceSettings) !Duration {
-    const settings = options.toCApi();
+    const settings = abi.to.diffsettings(options);
     const result = abi.c.temporal_rs_PlainTime_since(self._inner, other._inner, settings);
     const ptr = (try abi.extractResult(result)) orelse return abi.TemporalError.Generic;
     return .{ ._inner = ptr };
@@ -96,7 +97,7 @@ pub fn since(self: PlainTime, other: PlainTime, options: DifferenceSettings) !Du
 
 // Rounding
 pub fn round(self: PlainTime, options: RoundOptions) !PlainTime {
-    return wrapPlainTime(abi.c.temporal_rs_PlainTime_round(self._inner, options.toCApi()));
+    return wrapPlainTime(abi.c.temporal_rs_PlainTime_round(self._inner, abi.to.roundingOpts(options)));
 }
 
 // Property accessors
@@ -146,8 +147,8 @@ pub fn toString(self: PlainTime, allocator: std.mem.Allocator) ![]u8 {
     return toStringWithOptions(self, allocator, .{});
 }
 
-fn toStringWithOptions(self: PlainTime, allocator: std.mem.Allocator, options: temporal_types.ToStringRoundingOptions) ![]u8 {
-    const rounding_opts = options.toCApi();
+fn toStringWithOptions(self: PlainTime, allocator: std.mem.Allocator, options: t.ToStringRoundingOptions) ![]u8 {
+    const rounding_opts = abi.to.strRoundingOpts(options);
     var write = abi.DiplomatWrite.init(allocator);
     defer write.deinit();
 
diff --git a/src/PlainYearMonth.zig b/src/PlainYearMonth.zig
index fbb0ef4..cb98680 100644
--- a/src/PlainYearMonth.zig
+++ b/src/PlainYearMonth.zig
@@ -1,18 +1,19 @@
 const std = @import("std");
 const abi = @import("abi.zig");
-const temporal_types = @import("temporal.zig");
+const t = @import("temporal.zig");
 
-const PlainYearMonth = @This();
 const PlainDate = @import("PlainDate.zig");
 const Duration = @import("Duration.zig");
 
+const PlainYearMonth = @This();
+
 _inner: *abi.c.PlainYearMonth,
 
 // Import types from temporal.zig
-pub const Unit = temporal_types.Unit;
-pub const RoundingMode = temporal_types.RoundingMode;
-pub const DifferenceSettings = temporal_types.DifferenceSettings;
-pub const RoundOptions = temporal_types.RoundingOptions;
+pub const Unit = t.Unit;
+pub const RoundingMode = t.RoundingMode;
+pub const DifferenceSettings = t.DifferenceSettings;
+pub const RoundOptions = t.RoundingOptions;
 
 // Type definitions for API compatibility
 pub const CalendarDisplay = enum {
@@ -95,14 +96,14 @@ pub fn subtract(self: PlainYearMonth, duration: Duration) !PlainYearMonth {
 }
 
 pub fn until(self: PlainYearMonth, other: PlainYearMonth, options: DifferenceSettings) !Duration {
-    const settings = options.toCApi();
+    const settings = abi.to.diffsettings(options);
     const result = abi.c.temporal_rs_PlainYearMonth_until(self._inner, other._inner, settings);
     const ptr = (try abi.extractResult(result)) orelse return abi.TemporalError.Generic;
     return .{ ._inner = ptr };
 }
 
 pub fn since(self: PlainYearMonth, other: PlainYearMonth, options: DifferenceSettings) !Duration {
-    const settings = options.toCApi();
+    const settings = abi.to.diffsettings(options);
     const result = abi.c.temporal_rs_PlainYearMonth_since(self._inner, other._inner, settings);
     const ptr = (try abi.extractResult(result)) orelse return abi.TemporalError.Generic;
     return .{ ._inner = ptr };
diff --git a/src/ZonedDateTime.zig b/src/ZonedDateTime.zig
index 7660efd..c98f912 100644
--- a/src/ZonedDateTime.zig
+++ b/src/ZonedDateTime.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 const abi = @import("abi.zig");
-const temporal_types = @import("temporal.zig");
+const t = @import("temporal.zig");
 
 const Instant = @import("Instant.zig");
 const PlainDate = @import("PlainDate.zig");
@@ -13,11 +13,11 @@ const ZonedDateTime = @This();
 _inner: *abi.c.ZonedDateTime,
 
 // Import types from temporal.zig
-pub const Unit = temporal_types.Unit;
-pub const RoundingMode = temporal_types.RoundingMode;
-pub const Sign = temporal_types.Sign;
-pub const DifferenceSettings = temporal_types.DifferenceSettings;
-pub const RoundOptions = temporal_types.RoundingOptions;
+pub const Unit = t.Unit;
+pub const RoundingMode = t.RoundingMode;
+pub const Sign = t.Sign;
+pub const DifferenceSettings = t.DifferenceSettings;
+pub const RoundOptions = t.RoundingOptions;
 
 pub const TimeZone = struct {
     _inner: abi.c.TimeZone,
@@ -179,12 +179,12 @@ pub fn getTimeZoneTransition(self: ZonedDateTime, direction: enum { next, previo
 
 /// Round to the given options
 pub fn round(self: ZonedDateTime, options: RoundOptions) !ZonedDateTime {
-    return wrapZonedDateTime(abi.c.temporal_rs_ZonedDateTime_round(self._inner, options.toCApi()));
+    return wrapZonedDateTime(abi.c.temporal_rs_ZonedDateTime_round(self._inner, abi.to.roundingOpts(options)));
 }
 
 /// Calculate duration since another ZonedDateTime
 pub fn since(self: ZonedDateTime, other: ZonedDateTime, settings: DifferenceSettings) !Duration {
-    const ptr = try abi.extractResult(abi.c.temporal_rs_ZonedDateTime_since(self._inner, other._inner, settings.toCApi()));
+    const ptr = try abi.extractResult(abi.c.temporal_rs_ZonedDateTime_since(self._inner, other._inner, abi.to.diffsettings(settings)));
     return .{ ._inner = ptr };
 }
 
@@ -253,7 +253,7 @@ pub fn toString(self: ZonedDateTime, allocator: std.mem.Allocator, opts: ToStrin
 
 /// Calculate duration until another ZonedDateTime
 pub fn until(self: ZonedDateTime, other: ZonedDateTime, settings: DifferenceSettings) !Duration {
-    const ptr = try abi.extractResult(abi.c.temporal_rs_ZonedDateTime_until(self._inner, other._inner, settings.toCApi()));
+    const ptr = try abi.extractResult(abi.c.temporal_rs_ZonedDateTime_until(self._inner, other._inner, abi.to.diffsettings(settings)));
     return .{ ._inner = ptr };
 }
 
@@ -281,7 +281,7 @@ pub fn withCalendar(self: ZonedDateTime, calendar: []const u8) !ZonedDateTime {
 
 /// Create a new ZonedDateTime with a different time
 pub fn withPlainTime(self: ZonedDateTime, time: ?PlainTime) !ZonedDateTime {
-    const time_ptr = if (time) |t| t._inner else null;
+    const time_ptr = if (time) |tt| tt._inner else null;
     return wrapZonedDateTime(abi.c.temporal_rs_ZonedDateTime_with_plain_time(self._inner, time_ptr));
 }
 
diff --git a/src/abi.zig b/src/abi.zig
index 6e36d52..cb3a054 100644
--- a/src/abi.zig
+++ b/src/abi.zig
@@ -304,3 +304,145 @@ pub inline fn extractResult(result: anytype) TemporalError!Success(@TypeOf(resul
     // Fallback for result types without detailed error information
     return TemporalError.Generic;
 }
+
+const t = @import("temporal.zig");
+const dur = @import("Duration.zig");
+const ins = @import("Instant.zig");
+
+pub const to = struct {
+    pub fn unit(opt: ?t.Unit) ?c.Unit {
+        return if (opt) |u| @as(c.Unit, @intCast(to.unitToCApi(u))) else null;
+    }
+
+    fn unitToCApi(u: t.Unit) c_uint {
+        return switch (u) {
+            .auto => c.Unit_Auto,
+            .nanosecond => c.Unit_Nanosecond,
+            .microsecond => c.Unit_Microsecond,
+            .millisecond => c.Unit_Millisecond,
+            .second => c.Unit_Second,
+            .minute => c.Unit_Minute,
+            .hour => c.Unit_Hour,
+            .day => c.Unit_Day,
+            .week => c.Unit_Week,
+            .month => c.Unit_Month,
+            .year => c.Unit_Year,
+        };
+    }
+
+    pub fn roundingMode(opt: ?t.RoundingMode) ?c.RoundingMode {
+        return if (opt) |m| @as(c.RoundingMode, @intCast(to.roundingModeToCApi(m))) else null;
+    }
+
+    fn roundingModeToCApi(m: t.RoundingMode) c_uint {
+        return switch (m) {
+            .ceil => c.RoundingMode_Ceil,
+            .floor => c.RoundingMode_Floor,
+            .expand => c.RoundingMode_Expand,
+            .trunc => c.RoundingMode_Trunc,
+            .half_ceil => c.RoundingMode_HalfCeil,
+            .half_floor => c.RoundingMode_HalfFloor,
+            .half_expand => c.RoundingMode_HalfExpand,
+            .half_trunc => c.RoundingMode_HalfTrunc,
+            .half_even => c.RoundingMode_HalfEven,
+        };
+    }
+
+    pub fn sign(opt: ?t.Sign) ?c.Sign {
+        return if (opt) |s| @as(c.Sign, @intCast(to.signToCApi(s))) else null;
+    }
+
+    fn signToCApi(s: t.Sign) c_int {
+        return switch (s) {
+            .positive => c.Sign_Positive,
+            .zero => c.Sign_Zero,
+            .negative => c.Sign_Negative,
+        };
+    }
+
+    pub fn strRoundingOpts(self: t.ToStringRoundingOptions) c.ToStringRoundingOptions {
+        const precision: c.Precision = if (self.fractional_second_digits) |fsd|
+            .{ .is_minute = false, .precision = toOption(c.OptionU8, fsd) }
+        else if (self.smallest_unit) |su|
+            switch (su) {
+                .second => .{ .is_minute = false, .precision = toOption(c.OptionU8, 0) },
+                .millisecond => .{ .is_minute = false, .precision = toOption(c.OptionU8, 3) },
+                .microsecond => .{ .is_minute = false, .precision = toOption(c.OptionU8, 6) },
+                .nanosecond => .{ .is_minute = false, .precision = toOption(c.OptionU8, 9) },
+                else => .{ .is_minute = false, .precision = toOption(c.OptionU8, null) },
+            }
+        else
+            .{ .is_minute = false, .precision = toOption(c.OptionU8, null) };
+
+        return .{
+            .precision = precision,
+            .smallest_unit = toUnitOption(unit(self.smallest_unit)),
+            .rounding_mode = toRoundingModeOption(roundingMode(self.rounding_mode)),
+        };
+    }
+
+    pub fn durRoundingOpts(self: dur.RoundingOptions) c.RoundingOptions {
+        return .{
+            .largest_unit = toUnitOption(unit(self.largest_unit)),
+            .smallest_unit = toUnitOption(unit(self.smallest_unit)),
+            .rounding_mode = toRoundingModeOption(roundingMode(self.rounding_mode)),
+            .increment = toOption(c.OptionU32, self.rounding_increment),
+        };
+    }
+
+    pub fn tz(self: ins.TimeZone) c.TimeZone {
+        return self._inner;
+    }
+
+    pub fn partialdur(self: dur.PartialDuration) c.PartialDuration {
+        return .{
+            .years = toOption(c.OptionI64, self.years),
+            .months = toOption(c.OptionI64, self.months),
+            .weeks = toOption(c.OptionI64, self.weeks),
+            .days = toOption(c.OptionI64, self.days),
+            .hours = toOption(c.OptionI64, self.hours),
+            .minutes = toOption(c.OptionI64, self.minutes),
+            .seconds = toOption(c.OptionI64, self.seconds),
+            .milliseconds = toOption(c.OptionI64, self.milliseconds),
+            .microseconds = toOption(c.OptionF64, self.microseconds),
+            .nanoseconds = toOption(c.OptionF64, self.nanoseconds),
+        };
+    }
+
+    pub fn durRelativeTo(self: dur.RelativeTo) c.RelativeTo {
+        switch (self) {
+            .plain_date => |pd| return .{ .date = pd._inner },
+            .zoned_date_time => |zdt| return .{ .zoned = zdt._inner },
+            .plain_date_time => |pdt| return .{ .date = (pdt.toPlainDate() catch unreachable)._inner },
+        }
+    }
+
+    pub fn roundingOpts(self: t.RoundingOptions) c.RoundingOptions {
+        return .{
+            .largest_unit = toUnitOption(to.unit(self.largest_unit)),
+            .smallest_unit = toUnitOption(to.unit(self.smallest_unit)),
+            .rounding_mode = toRoundingModeOption(to.roundingMode(self.rounding_mode)),
+            .increment = toOption(c.OptionU32, self.rounding_increment),
+        };
+    }
+
+    pub fn diffsettings(self: t.DifferenceSettings) c.DifferenceSettings {
+        return .{
+            .largest_unit = toUnitOption(to.unit(self.largest_unit)),
+            .smallest_unit = toUnitOption(to.unit(self.smallest_unit)),
+            .rounding_mode = toRoundingModeOption(to.roundingMode(self.rounding_mode)),
+            .increment = toOption(c.OptionU32, self.rounding_increment),
+        };
+    }
+};
+
+pub const from = struct {
+    pub fn sign(value: c_int) t.Sign {
+        return switch (value) {
+            c.Sign_Positive => .positive,
+            c.Sign_Zero => .zero,
+            c.Sign_Negative => .negative,
+            else => .zero,
+        };
+    }
+};
diff --git a/src/temporal.zig b/src/temporal.zig
index c76c4a5..3738efe 100644
--- a/src/temporal.zig
+++ b/src/temporal.zig
@@ -1,6 +1,3 @@
-const abi = @import("abi.zig");
-const c = abi.c;
-
 /// Time unit for Temporal operations.
 /// See: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal
 pub const Unit = enum {
@@ -15,22 +12,6 @@ pub const Unit = enum {
     week,
     month,
     year,
-
-    pub fn toCApi(self: Unit) c_uint {
-        return switch (self) {
-            .auto => c.Unit_Auto,
-            .nanosecond => c.Unit_Nanosecond,
-            .microsecond => c.Unit_Microsecond,
-            .millisecond => c.Unit_Millisecond,
-            .second => c.Unit_Second,
-            .minute => c.Unit_Minute,
-            .hour => c.Unit_Hour,
-            .day => c.Unit_Day,
-            .week => c.Unit_Week,
-            .month => c.Unit_Month,
-            .year => c.Unit_Year,
-        };
-    }
 };
 
 /// Rounding mode for Temporal operations.
@@ -54,20 +35,6 @@ pub const RoundingMode = enum {
     half_trunc,
     /// Round half to even (banker's rounding)
     half_even,
-
-    pub fn toCApi(self: RoundingMode) c_uint {
-        return switch (self) {
-            .ceil => c.RoundingMode_Ceil,
-            .floor => c.RoundingMode_Floor,
-            .expand => c.RoundingMode_Expand,
-            .trunc => c.RoundingMode_Trunc,
-            .half_ceil => c.RoundingMode_HalfCeil,
-            .half_floor => c.RoundingMode_HalfFloor,
-            .half_expand => c.RoundingMode_HalfExpand,
-            .half_trunc => c.RoundingMode_HalfTrunc,
-            .half_even => c.RoundingMode_HalfEven,
-        };
-    }
 };
 
 /// Sign of a duration or time value.
@@ -75,23 +42,6 @@ pub const Sign = enum {
     positive,
     zero,
     negative,
-
-    pub fn toCApi(self: Sign) c_int {
-        return switch (self) {
-            .positive => c.Sign_Positive,
-            .zero => c.Sign_Zero,
-            .negative => c.Sign_Negative,
-        };
-    }
-
-    pub fn fromCApi(value: c_int) Sign {
-        return switch (value) {
-            c.Sign_Positive => .positive,
-            c.Sign_Zero => .zero,
-            c.Sign_Negative => .negative,
-            else => .zero,
-        };
-    }
 };
 
 /// Options for rounding operations (Instant.round, Duration.round, etc.).
@@ -101,15 +51,6 @@ pub const RoundingOptions = struct {
     smallest_unit: ?Unit = null,
     rounding_mode: ?RoundingMode = null,
     rounding_increment: ?u32 = null,
-
-    pub fn toCApi(self: RoundingOptions) c.RoundingOptions {
-        return .{
-            .largest_unit = abi.toUnitOption(toCUnit(self.largest_unit)),
-            .smallest_unit = abi.toUnitOption(toCUnit(self.smallest_unit)),
-            .rounding_mode = abi.toRoundingModeOption(toCRoundingMode(self.rounding_mode)),
-            .increment = abi.toOption(c.OptionU32, self.rounding_increment),
-        };
-    }
 };
 
 /// Options for computing differences between instants.
@@ -119,15 +60,6 @@ pub const DifferenceSettings = struct {
     smallest_unit: ?Unit = null,
     rounding_mode: ?RoundingMode = null,
     rounding_increment: ?u32 = null,
-
-    pub fn toCApi(self: DifferenceSettings) c.DifferenceSettings {
-        return .{
-            .largest_unit = abi.toUnitOption(toCUnit(self.largest_unit)),
-            .smallest_unit = abi.toUnitOption(toCUnit(self.smallest_unit)),
-            .rounding_mode = abi.toRoundingModeOption(toCRoundingMode(self.rounding_mode)),
-            .increment = abi.toOption(c.OptionU32, self.rounding_increment),
-        };
-    }
 };
 
 /// Options for Duration.toString() formatting.
@@ -136,33 +68,16 @@ pub const ToStringRoundingOptions = struct {
     fractional_second_digits: ?u8 = null,
     smallest_unit: ?Unit = null,
     rounding_mode: ?RoundingMode = null,
+};
 
-    pub fn toCApi(self: ToStringRoundingOptions) c.ToStringRoundingOptions {
-        const precision: c.Precision = if (self.fractional_second_digits) |fsd|
-            .{ .is_minute = false, .precision = abi.toOption(c.OptionU8, fsd) }
-        else if (self.smallest_unit) |su|
-            switch (su) {
-                .second => .{ .is_minute = false, .precision = abi.toOption(c.OptionU8, 0) },
-                .millisecond => .{ .is_minute = false, .precision = abi.toOption(c.OptionU8, 3) },
-                .microsecond => .{ .is_minute = false, .precision = abi.toOption(c.OptionU8, 6) },
-                .nanosecond => .{ .is_minute = false, .precision = abi.toOption(c.OptionU8, 9) },
-                else => .{ .is_minute = false, .precision = abi.toOption(c.OptionU8, null) },
-            }
-        else
-            .{ .is_minute = false, .precision = abi.toOption(c.OptionU8, null) };
+/// Time zone identifier for Temporal operations
+pub const TimeZone = struct {
+    _inner: abi.c.TimeZone,
 
-        return .{
-            .precision = precision,
-            .smallest_unit = abi.toUnitOption(toCUnit(self.smallest_unit)),
-            .rounding_mode = abi.toRoundingModeOption(toCRoundingMode(self.rounding_mode)),
-        };
+    pub fn init(id: []const u8) TimeZone {
+        const view = abi.toDiplomatStringView(id);
+        return .{ ._inner = .{ .id = view } };
     }
 };
 
-pub fn toCUnit(opt: ?Unit) ?c.Unit {
-    return if (opt) |u| @as(c.Unit, @intCast(u.toCApi())) else null;
-}
-
-pub fn toCRoundingMode(opt: ?RoundingMode) ?c.RoundingMode {
-    return if (opt) |m| @as(c.RoundingMode, @intCast(m.toCApi())) else null;
-}
+const abi = @import("abi.zig");