diff --git a/src/Webapi.res b/src/Webapi.res
index c68d2ae5..b613f7bd 100644
--- a/src/Webapi.res
+++ b/src/Webapi.res
@@ -16,6 +16,7 @@ module ReadableStream = Webapi__ReadableStream
 module IntersectionObserver = Webapi__IntersectionObserver
 module ResizeObserver = Webapi__ResizeObserver
 module Url = Webapi__Url
+module Temporal = Webapi__Temporal
 module WebSocket = Webapi__WebSocket
 
 type rafId
diff --git a/src/Webapi/Temporal/Webapi__Temporal__Calendar.res b/src/Webapi/Temporal/Webapi__Temporal__Calendar.res
new file mode 100644
index 00000000..42506a7e
--- /dev/null
+++ b/src/Webapi/Temporal/Webapi__Temporal__Calendar.res
@@ -0,0 +1 @@
+type t = Webapi__Temporal__Types.calendar
diff --git a/src/Webapi/Temporal/Webapi__Temporal__Difference.res b/src/Webapi/Temporal/Webapi__Temporal__Difference.res
new file mode 100644
index 00000000..d5b7e8fa
--- /dev/null
+++ b/src/Webapi/Temporal/Webapi__Temporal__Difference.res
@@ -0,0 +1,22 @@
+module DifferenceOptions = {
+  type t
+
+  type durationUnit = [
+    | #auto
+    | #hour
+    | #minute
+    | #second
+    | #millisecond
+    | #microsecond
+    | #nanosecond
+  ]
+
+  @obj
+  external make: (
+    ~largestUnit: durationUnit=?,
+    ~smallestUnit: durationUnit=?,
+    ~roundingIncrement: int=?,
+    ~roundingMode: [#halfExpand | #ceil | #trunc | #floor]=?,
+    unit
+  ) => t = ""
+}
diff --git a/src/Webapi/Temporal/Webapi__Temporal__Duration.res b/src/Webapi/Temporal/Webapi__Temporal__Duration.res
new file mode 100644
index 00000000..e31c4b28
--- /dev/null
+++ b/src/Webapi/Temporal/Webapi__Temporal__Duration.res
@@ -0,0 +1,105 @@
+type t = Webapi__Temporal__Types.duration
+
+@new
+external make: (
+  ~years: int=?,
+  ~months: int=?,
+  ~weeks: int=?,
+  ~days: int=?,
+  ~hours: int=?,
+  ~minutes: int=?,
+  ~seconds: int=?,
+  ~milliseconds: int=?,
+  ~microseconds: int=?,
+  ~nanoseconds: int=?,
+  unit,
+) => t = "Temporal.Duration"
+
+@scope("Temporal.Duration") @val external fromString: string => t = "from"
+@scope("Temporal.Duration") @val external compare: (t, t) => int = "compare"
+@scope("Temporal.Duration") @val
+external compareRelativeToPlainDate: (t, {"relativeTo": Webapi__Temporal__Types.plainDate}) => int =
+  "compare"
+@scope("Temporal.Duration") @val
+external compareRelativeToZonedDateTime: (
+  t,
+  {"relativeTo": Webapi__Temporal__Types.zonedDateTime},
+) => int = "compare"
+
+@get external years: t => int = "years"
+@get external months: t => int = "months"
+@get external days: t => int = "days"
+@get external hours: t => int = "hours"
+@get external minutes: t => int = "minutes"
+@get external seconds: t => int = "seconds"
+@get external milliseconds: t => int = "milliseconds"
+@get external microseconds: t => int = "microseconds"
+@get external nanoseconds: t => int = "nanoseconds"
+@get external sign: t => int = "sign"
+@get external blank: t => bool = "blank"
+// TODO: Add `with` binding
+@send external add: (t, t) => t = "add"
+@send
+external addRelativeToPlainDate: (t, t, {"relativeTo": Webapi__Temporal__Types.plainDate}) => t =
+  "add"
+@send
+external addRelativeToZonedDateTime: (
+  t,
+  t,
+  {"relativeTo": Webapi__Temporal__Types.zonedDateTime},
+) => t = "add"
+@send external subtract: (t, t) => t = "subtract"
+@send
+external subtractRelativeToPlainDate: (
+  t,
+  t,
+  {"relativeTo": Webapi__Temporal__Types.plainDate},
+) => t = "subtract"
+@send
+external subtractRelativeToZonedDateTime: (
+  t,
+  t,
+  {"relativeTo": Webapi__Temporal__Types.zonedDateTime},
+) => t = "subtract"
+@send external negated: t => t = "negated"
+@send external abs: t => t = "abs"
+
+type roundTo = [
+  | #day
+  | #hour
+  | #minute
+  | #second
+  | #millisecond
+  | #microsecond
+  | #nanosecond
+]
+
+@send external round: (t, ~to: roundTo) => t = "round"
+// TODO: roundWithOptions. Tough because relativeTo can be either a PlainDate or ZonedDateTime
+@send
+external total: (
+  t,
+  [#hour | #minute | #second | #millisecond | #microsecond | #nanosecond],
+) => float = "total"
+// TODO: totalWithOptions. Tough because relativeTo can be either a PlainDate or ZonedDateTime
+
+module ToStringOptions = {
+  type t
+
+  @obj
+  external make: (
+    ~fractionalSecondDigits: [#auto | #0 | #1 | #2 | #3 | #4 | #5 | #6 | #7 | #8 | #9]=?,
+    ~smallestUnit: [
+      | #second
+      | #millisecond
+      | #microsecond
+      | #nanosecond
+    ]=?,
+    ~roundingMode: [#halfExpand | #ceil | #trunc | #floor]=?,
+    unit
+  ) => t = ""
+}
+
+@send external toString: t => string = "toString"
+@send external toStringWithOptions: (t, ToStringOptions.t) => string = "toString"
+// TODO: toLocaleString, need Intl bindings
diff --git a/src/Webapi/Temporal/Webapi__Temporal__Instant.res b/src/Webapi/Temporal/Webapi__Temporal__Instant.res
new file mode 100644
index 00000000..7bef70cf
--- /dev/null
+++ b/src/Webapi/Temporal/Webapi__Temporal__Instant.res
@@ -0,0 +1,92 @@
+type t = Webapi__Temporal__Types.instant
+
+// @new external make: BigInt.t => t = "Temporal.Instant"
+@scope("Temporal.Instant") @val external fromString: string => t = "from"
+@scope("Temporal.Instant") @val external fromInstant: t => t = "from"
+@scope("Temporal.Instant") @val external fromEpochSeconds: float => t = "fromEpochSeconds"
+@scope("Temporal.Instant") @val
+external fromEpochMilliseconds: float => t = "fromEpochMilliseconds"
+// @scope("Temporal.Instant") @val external fromEpochMicroseconds: BigInt.t => t = "fromEpochMicroseconds"
+// @scope("Temporal.Instant") @val external fromEpochNanoseconds: BigInt.t => t = "fromEpochNanoseconds"
+@scope("Temporal.Instant") @val external compare: (t, t) => int = "compare"
+@scope("Temporal.Instant") @val external compareStrings: (string, string) => int = "compare"
+
+@get external epochSeconds: t => float = "epochSeconds"
+@get external epochMilliseconds: t => float = "epochMilliseconds"
+// @get external epochMicroseconds: t => BigInt.t = "epochMicroseconds"
+// @get external epochNanoseconds: t => BigInt.t = "epochNanoseconds"
+@send
+external toZonedDateTimeISO: (
+  t,
+  Webapi__Temporal__Types.timeZone,
+) => Webapi__Temporal__ZonedDateTime.t = "toZonedDateTimeISO"
+@send
+external toZonedDateTime: (
+  t,
+  {"timeZone": Webapi__Temporal__Types.timeZone, "calendar": Webapi__Temporal__Types.calendar},
+) => Webapi__Temporal__ZonedDateTime.t = "toZonedDateTime"
+@send external add: (t, Webapi__Temporal__Types.duration) => t = "add"
+@send external subtract: (t, Webapi__Temporal__Types.duration) => t = "subtract"
+
+@send external until: (t, t) => Webapi__Temporal__Types.duration = "until"
+@send
+external untilWithOptions: (
+  t,
+  t,
+  Webapi__Temporal__Difference.DifferenceOptions.t,
+) => Webapi__Temporal__Types.duration = "until"
+@send external since: (t, t) => Webapi__Temporal__Types.duration = "since"
+@send
+external sinceWithOptions: (
+  t,
+  t,
+  Webapi__Temporal__Difference.DifferenceOptions.t,
+) => Webapi__Temporal__Types.duration = "since"
+
+type roundTo = [
+  | #hour
+  | #minute
+  | #second
+  | #millisecond
+  | #microsecond
+  | #nanosecond
+]
+
+module RoundOptions = {
+  type t
+
+  @obj
+  external make: (
+    ~smallestUnit: roundTo,
+    ~roundingIncrement: int=?,
+    ~roundingMode: [#halfExpand | #ceil | #trunc | #floor]=?,
+    unit
+  ) => t = ""
+}
+
+@send external round: (t, ~to: roundTo) => t = "round"
+@send external roundWithOptions: (t, RoundOptions.t) => t = "round"
+@send external equals: (t, t) => bool = "equals"
+
+module ToStringOptions = {
+  type t
+
+  @obj
+  external make: (
+    ~timeZone: Webapi__Temporal__Types.timeZone=?,
+    ~fractionalSecondDigits: [#auto | #0 | #1 | #2 | #3 | #4 | #5 | #6 | #7 | #8 | #9]=?,
+    ~smallestUnit: [
+      | #minute
+      | #second
+      | #millisecond
+      | #microsecond
+      | #nanosecond
+    ]=?,
+    ~roundingMode: [#halfExpand | #ceil | #trunc | #floor]=?,
+    unit
+  ) => t = ""
+}
+
+@send external toString: t => string = "toString"
+@send external toStringWithOptions: (t, ToStringOptions.t) => string = "toString"
+// TODO: toLocaleString, need Intl bindings
diff --git a/src/Webapi/Temporal/Webapi__Temporal__Now.res b/src/Webapi/Temporal/Webapi__Temporal__Now.res
new file mode 100644
index 00000000..86252544
--- /dev/null
+++ b/src/Webapi/Temporal/Webapi__Temporal__Now.res
@@ -0,0 +1,49 @@
+@scope("Temporal.Now") @val
+external zonedDateTimeISO: unit => Webapi__Temporal__Types.zonedDateTime = "zonedDateTimeISO"
+@scope("Temporal.Now") @val
+external zonedDateTimeISOWithTimeZone: Webapi__Temporal__Types.timeZone => Webapi__Temporal__Types.zonedDateTime =
+  "zonedDateTimeISO"
+@scope("Temporal.Now") @val
+external zonedDateTime: Webapi__Temporal__Types.calendar => Webapi__Temporal__Types.zonedDateTime =
+  "zonedDateTime"
+@scope("Temporal.Now") @val
+external zonedDateTimeWithTimeZone: (
+  Webapi__Temporal__Types.calendar,
+  Webapi__Temporal__Types.timeZone,
+) => Webapi__Temporal__Types.zonedDateTime = "zonedDateTimeWithTimeZone"
+@scope("Temporal.Now") @val external instant: unit => Webapi__Temporal__Types.instant = "instant"
+@scope("Temporal.Now") @val external timeZone: unit => Webapi__Temporal__Types.timeZone = "timeZone"
+
+@scope("Temporal.Now") @val
+external plainDateTimeISO: unit => Webapi__Temporal__Types.plainDateTime = "plainDateTimeISO"
+@scope("Temporal.Now") @val
+external plainDateTimeISOWithTimeZone: Webapi__Temporal__Types.timeZone => Webapi__Temporal__Types.plainDateTime =
+  "plainDateTimeISO"
+@scope("Temporal.Now") @val
+external plainDateTime: Webapi__Temporal__Types.calendar => Webapi__Temporal__Types.plainDateTime =
+  "plainDateTime"
+@scope("Temporal.Now") @val
+external plainDateTimeWithTimeZone: (
+  Webapi__Temporal__Types.calendar,
+  Webapi__Temporal__Types.timeZone,
+) => Webapi__Temporal__Types.plainDateTime = "plainDateTime"
+
+@scope("Temporal.Now") @val
+external plainDateISO: unit => Webapi__Temporal__Types.plainDate = "plainDateISO"
+@scope("Temporal.Now") @val
+external plainDateISOWithTimeZone: Webapi__Temporal__Types.timeZone => Webapi__Temporal__Types.plainDate =
+  "plainDateISO"
+@scope("Temporal.Now") @val
+external plainDate: Webapi__Temporal__Types.calendar => Webapi__Temporal__Types.plainDate =
+  "plainDate"
+@scope("Temporal.Now") @val
+external plainDateWithTimeZone: (
+  Webapi__Temporal__Types.calendar,
+  Webapi__Temporal__Types.timeZone,
+) => Webapi__Temporal__Types.plainDate = "plainDate"
+
+@scope("Temporal.Now") @val
+external plainTimeISO: unit => Webapi__Temporal__Types.plainTime = "plainTimeISO"
+@scope("Temporal.Now") @val
+external plainTimeISOWithTimeZone: Webapi__Temporal__Types.timeZone => Webapi__Temporal__Types.plainTime =
+  "plainTimeISO"
diff --git a/src/Webapi/Temporal/Webapi__Temporal__PlainDate.res b/src/Webapi/Temporal/Webapi__Temporal__PlainDate.res
new file mode 100644
index 00000000..6ae9fad4
--- /dev/null
+++ b/src/Webapi/Temporal/Webapi__Temporal__PlainDate.res
@@ -0,0 +1,123 @@
+type t = Webapi__Temporal__Types.plainDate
+
+@new
+external make: (
+  ~isoYear: int,
+  ~isoMonth: int,
+  ~isoDay: int,
+  ~calendar: Webapi__Temporal__Types.calendar=?,
+  unit
+) => t = "Temporal.PlainDate"
+
+module PlainDateInit = {
+  type t
+
+  // TODO: Review type safety. Not all of these options are valid together when passed to fromInit
+  @obj
+  external make: (
+    ~year: int=?,
+    ~month: int=?,
+    ~day: int=?,
+    ~era: string=?,
+    ~eraYear: int=?,
+    ~monthCode: string=?,
+    unit
+  ) => t = ""
+}
+
+@scope("Temporal.PlainDate") @val external fromString: string => t = "from"
+@scope("Temporal.PlainDate") @val
+external fromStringWithOptions: (string, {"overflow": [#constrain | #reject]}) => t = "from"
+@scope("Temporal.PlainDate") @val external fromInit: PlainDateInit.t => t = "from"
+@scope("Temporal.PlainDate") @val
+external fromInitWithOptions: (PlainDateInit.t, {"overflow": [#constrain | #reject]}) => t = "from"
+@scope("Temporal.PlainDate") @val external compare: (t, t) => int = "compare"
+@get external year: t => int = "year"
+@get external month: t => int = "month"
+@get external day: t => int = "day"
+@get external monthCode: t => int = "monthCode"
+@get external calendar: t => Webapi__Temporal__Types.calendar = "calendar"
+@get external timeZone: t => Webapi__Temporal__Types.timeZone = "timeZone"
+@get external era: t => option<string> = "era"
+@get external eraYear: t => option<float> = "eraYear"
+@get external dayOfWeek: t => int = "dayOfWeek"
+@get external dayOfYear: t => int = "dayOfYear"
+@get external weekOfYear: t => int = "weekOfYear"
+@get external daysInWeek: t => int = "daysInWeek"
+@get external daysInMonth: t => int = "daysInMonth"
+@get external daysInYear: t => int = "daysInYear"
+@get external monthsInYear: t => int = "monthsInYear"
+@get external inLeapYear: t => bool = "inLeapYear"
+// TODO: add `with` binding
+@send external withCalendar: (t, Webapi__Temporal__Types.calendar) => t = "withCalendar"
+@send external add: (t, Webapi__Temporal__Types.duration) => t = "add"
+@send
+external addWithOptions: (
+  t,
+  Webapi__Temporal__Types.duration,
+  {"overflow": [#constrain | #reject]},
+) => t = "add"
+@send external subtract: (t, Webapi__Temporal__Types.duration) => t = "subtract"
+@send
+external subtractWithOptions: (
+  t,
+  Webapi__Temporal__Types.duration,
+  {"overflow": [#constrain | #reject]},
+) => t = "subtract"
+@send external until: (t, t) => Webapi__Temporal__Types.duration = "until"
+@send
+external untilWithOptions: (
+  t,
+  t,
+  // TODO: Need a different type as the valid units don't include time here
+  Webapi__Temporal__Difference.DifferenceOptions.t,
+) => Webapi__Temporal__Types.duration = "until"
+@send external since: (t, t) => Webapi__Temporal__Types.duration = "since"
+@send
+external sinceWithOptions: (
+  t,
+  t,
+  Webapi__Temporal__Difference.DifferenceOptions.t,
+) => Webapi__Temporal__Types.duration = "since"
+@send external equals: (t, t) => bool = "equals"
+
+module ToStringOptions = {
+  type t
+
+  @obj
+  external make: (~calendarName: [#auto | #always | #never]=?) => t = ""
+}
+
+@send external toString: t => string = "toString"
+@send external toStringWithOptions: (t, ToStringOptions.t) => string = "toString"
+// TODO: toLocaleString, need Intl bindings
+
+module ToZonedDateTimeOptions = {
+  type t
+  @obj
+  external make: (
+    ~plainTime: Webapi__Temporal__Types.plainTime=?,
+    ~timeZone: Webapi__Temporal__Types.timeZone,
+    unit
+  ) => t = ""
+}
+
+@send
+external toZonedDateTime: (t, ToZonedDateTimeOptions.t) => Webapi__Temporal__Types.zonedDateTime =
+  "toZonedDateTime"
+@send external toPlainDateTime: t => Webapi__Temporal__Types.plainDateTime = "toPlainDateTime"
+@send
+external toPlainDateTimeWithPlainTime: (
+  t,
+  Webapi__Temporal__Types.plainTime,
+) => Webapi__Temporal__Types.plainDateTime = "toPlainDateTime"
+@send external toPlainYearMonth: t => Webapi__Temporal__Types.plainYearMonth = "toPlainYearMonth"
+@send external toPlainMonthDay: t => Webapi__Temporal__Types.plainMonthDay = "toPlainMonthDay"
+
+type isoFields = {
+  isoYear: int,
+  isoMonth: int,
+  isoDay: int,
+  calendar: Webapi__Temporal__Types.calendar,
+}
+@send external getISOFields: t => isoFields = "getISOFields"
diff --git a/src/Webapi/Temporal/Webapi__Temporal__PlainTime.res b/src/Webapi/Temporal/Webapi__Temporal__PlainTime.res
new file mode 100644
index 00000000..4ce63740
--- /dev/null
+++ b/src/Webapi/Temporal/Webapi__Temporal__PlainTime.res
@@ -0,0 +1,129 @@
+type t = Webapi__Temporal__Types.plainTime
+
+@new
+external make: (
+  ~isoHour: int=?,
+  ~isoMinute: int=?,
+  ~isoSecond: int=?,
+  ~isoMillisecond: int=?,
+  ~isoMicrosecond: int=?,
+  ~isoNanosecond: int=?,
+  unit
+) => t = "Temporal.PlainTime"
+
+module PlainTimeInit = {
+  type t
+  @obj
+  external make: (
+    ~hour: int=?,
+    ~minute: int=?,
+    ~second: int=?,
+    ~millisecond: int=?,
+    ~microsecond: int=?,
+    ~nanosecond: int=?,
+    unit
+  ) => t = ""
+}
+
+@scope("Temporal.PlainTime") @val external fromString: string => t = "from"
+@scope("Temporal.PlainDate") @val
+external fromStringWithOptions: (string, {"overflow": [#constrain | #reject]}) => t = "from"
+@scope("Temporal.PlainTime") @val external fromInit: PlainTimeInit.t => t = "from"
+@scope("Temporal.PlainTime") @val
+external fromInitWithOptions: (PlainTimeInit.t, {"overflow": [#constrain | #reject]}) => t = "from"
+@scope("Temporal.PlainTime") @val external compare: (t, t) => int = "compare"
+@get external hour: t => int = "hour"
+@get external minute: t => int = "minute"
+@get external second: t => int = "second"
+@get external millisecond: t => int = "millisecond"
+@get external microsecond: t => int = "microsecond"
+@get external nanosecond: t => int = "nanosecond"
+@get external calendar: t => Webapi__Temporal__Types.calendar = "calendar"
+// TODO: add `with` binding
+@send external add: (t, Webapi__Temporal__Types.duration) => t = "add"
+@send external subtract: (t, Webapi__Temporal__Types.duration) => t = "subtract"
+@send external until: (t, t) => Webapi__Temporal__Types.duration = "until"
+@send
+external untilWithOptions: (
+  t,
+  t,
+  // TODO: Need a different type as the valid units don't include time here
+  Webapi__Temporal__Difference.DifferenceOptions.t,
+) => Webapi__Temporal__Types.duration = "until"
+@send external since: (t, t) => Webapi__Temporal__Types.duration = "since"
+@send
+external sinceWithOptions: (
+  t,
+  t,
+  Webapi__Temporal__Difference.DifferenceOptions.t,
+) => Webapi__Temporal__Types.duration = "since"
+@send external equals: (t, t) => bool = "equals"
+
+type roundTo = [
+  | #hour
+  | #minute
+  | #second
+  | #millisecond
+  | #microsecond
+  | #nanosecond
+]
+
+module RoundOptions = {
+  type t
+
+  @obj
+  external make: (
+    ~smallestUnit: roundTo,
+    ~roundingIncrement: int=?,
+    ~roundingMode: [#halfExpand | #ceil | #trunc | #floor]=?,
+    unit
+  ) => t = ""
+}
+
+@send external round: (t, ~to: roundTo) => t = "round"
+@send external roundWithOptions: (t, RoundOptions.t) => t = "round"
+
+module ToStringOptions = {
+  type t
+
+  @obj
+  external make: (
+    ~timeZone: Webapi__Temporal__Types.timeZone=?,
+    ~fractionalSecondDigits: [#auto | #0 | #1 | #2 | #3 | #4 | #5 | #6 | #7 | #8 | #9]=?,
+    ~smallestUnit: [
+      | #minute
+      | #second
+      | #millisecond
+      | #microsecond
+      | #nanosecond
+    ]=?,
+    ~roundingMode: [#halfExpand | #ceil | #trunc | #floor]=?,
+    unit
+  ) => t = ""
+}
+
+@send external toString: t => string = "toString"
+@send external toStringWithOptions: (t, ToStringOptions.t) => string = "toString"
+// TODO: toLocaleString, need Intl bindings
+@send
+external toZonedDateTime: (
+  t,
+  {"timeZone": Webapi__Temporal__Types.timeZone, "plainDate": Webapi__Temporal__Types.plainDate},
+) => Webapi__Temporal__ZonedDateTime.t = "toZonedDateTime"
+@send
+external toPlainDateTime: (
+  t,
+  Webapi__Temporal__Types.plainDate,
+) => Webapi__Temporal__ZonedDateTime.t = "toPlainDateTime"
+
+type isoFields = {
+  isoHour: int,
+  isoMinute: int,
+  isoSecond: int,
+  isoMillisecond: int,
+  isoMicrosecond: int,
+  isoNanosecond: int,
+  calendar: Webapi__Temporal__Types.calendar,
+}
+
+@send external getISOFields: t => isoFields = "getISOFields"
diff --git a/src/Webapi/Temporal/Webapi__Temporal__TimeZone.res b/src/Webapi/Temporal/Webapi__Temporal__TimeZone.res
new file mode 100644
index 00000000..4ef2cdf9
--- /dev/null
+++ b/src/Webapi/Temporal/Webapi__Temporal__TimeZone.res
@@ -0,0 +1 @@
+type t = Webapi__Temporal__Types.timeZone
diff --git a/src/Webapi/Temporal/Webapi__Temporal__Types.res b/src/Webapi/Temporal/Webapi__Temporal__Types.res
new file mode 100644
index 00000000..9304d6ff
--- /dev/null
+++ b/src/Webapi/Temporal/Webapi__Temporal__Types.res
@@ -0,0 +1,10 @@
+type calendar
+type duration
+type instant
+type plainDate
+type plainDateTime
+type plainTime
+type plainYearMonth
+type plainMonthDay
+type timeZone
+type zonedDateTime
diff --git a/src/Webapi/Temporal/Webapi__Temporal__ZonedDateTime.res b/src/Webapi/Temporal/Webapi__Temporal__ZonedDateTime.res
new file mode 100644
index 00000000..0c61821c
--- /dev/null
+++ b/src/Webapi/Temporal/Webapi__Temporal__ZonedDateTime.res
@@ -0,0 +1,155 @@
+type t = Webapi__Temporal__Types.zonedDateTime
+
+// @new external make: (~epochNanoseconds: BigInt.t, ~timeZone: TimeZone.t, unit) => t = "Temporal.ZonedDateTime"
+// @new external makeWithCalendar: (~epochNanoseconds: BigInt.t, ~timeZone: TimeZone.t, ~calendar: Calendar.t, unit) => t = "Temporal.ZonedDateTime"
+
+module ZonedDateTimeInit = {
+  type t
+
+  @obj
+  external make: (
+    ~timeZone: Webapi__Temporal__Types.timeZone=?,
+    ~year: int=?,
+    ~month: int=?,
+    ~day: int=?,
+    ~minute: int=?,
+    ~second: int=?,
+    ~millisecond: int=?,
+    ~microsecond: int=?,
+    ~nanosecond: int=?,
+    unit
+  ) => t = ""
+}
+
+module FromOptions = {
+  type t
+
+  @obj
+  external make: (
+    ~overflow: [#constrain | #reject]=?,
+    ~disambiguation: [#compatible | #earlier | #later | #reject]=?,
+    ~offset: [#use | #ignore | #prefer | #reject]=?,
+    unit
+  ) => t = ""
+}
+
+@scope("Temporal.ZonedDateTime") @val external fromString: string => t = "from"
+@scope("Temporal.ZonedDateTime") @val
+external fromStringWithOptions: (string, FromOptions.t) => t = "from"
+@scope("Temporal.ZonedDateTime") @val external fromInit: ZonedDateTimeInit.t => t = "from"
+@scope("Temporal.ZonedDateTime") @val
+external fromInitWithOptions: (ZonedDateTimeInit.t, FromOptions.t) => t = "from"
+@send external compare: (t, t) => int = "compare"
+@get external year: t => int = "year"
+@get external month: t => int = "month"
+@get external day: t => int = "day"
+@get external hour: t => int = "hour"
+@get external minute: t => int = "minute"
+@get external second: t => int = "second"
+@get external millisecond: t => int = "millisecond"
+@get external microsecond: t => int = "microsecond"
+@get external nanosecond: t => int = "nanosecond"
+@get external monthCode: t => int = "monthCode"
+@get external epochSeconds: t => float = "epochSeconds"
+@get external epochMilliseconds: t => float = "epochMilliseconds"
+// @get external epochMicroseconds: t => BigInt.t = "epochMicroseconds"
+// @get external epochNanoseconds: t => BigInt.t = "epochNanoseconds"
+@get external calendar: t => Webapi__Temporal__Types.calendar = "calendar"
+@get external timeZone: t => Webapi__Temporal__Types.timeZone = "timeZone"
+@get external era: t => option<string> = "era"
+@get external eraYear: t => option<float> = "eraYear"
+@get external dayOfWeek: t => int = "dayOfWeek"
+@get external dayOfYear: t => int = "dayOfYear"
+@get external weekOfYear: t => int = "weekOfYear"
+@get external daysInWeek: t => int = "daysInWeek"
+@get external daysInMonth: t => int = "daysInMonth"
+@get external daysInYear: t => int = "daysInYear"
+@get external monthsInYear: t => int = "monthsInYear"
+@get external inLeapYear: t => bool = "inLeapYear"
+@get external hoursInDay: t => int = "hoursInDay"
+@get external startOfDay: t => t = "startOfDay"
+@get external offsetNanoseconds: t => float = "offsetNanoseconds"
+@get external offset: t => string = "offset"
+// TODO: Add `with` binding
+@send external withPlainTime: (t, Webapi__Temporal__Types.plainTime) => t = "withPlainTime"
+@send external withPlainDate: (t, Webapi__Temporal__Types.plainDate) => t = "withPlainDate"
+@send external withTimeZone: (t, Webapi__Temporal__Types.timeZone) => t = "withTimeZone"
+@send external withCalendar: (t, Webapi__Temporal__Types.calendar) => t = "withCalendar"
+@send external add: (t, Webapi__Temporal__Types.duration) => t = "add"
+@send
+external addWithOptions: (
+  t,
+  Webapi__Temporal__Types.duration,
+  {"overflow": [#constrain | #reject]},
+) => t = "add"
+@send external subtract: (t, Webapi__Temporal__Types.duration) => t = "subtract"
+@send
+external subtractWithOptions: (
+  t,
+  Webapi__Temporal__Types.duration,
+  {"overflow": [#constrain | #reject]},
+) => t = "subtract"
+
+@send external until: (t, t) => Webapi__Temporal__Types.duration = "until"
+@send
+external untilWithOptions: (
+  t,
+  t,
+  Webapi__Temporal__Difference.DifferenceOptions.t,
+) => Webapi__Temporal__Types.duration = "until"
+@send external since: (t, t) => Webapi__Temporal__Types.duration = "since"
+@send
+external sinceWithOptions: (
+  t,
+  t,
+  Webapi__Temporal__Difference.DifferenceOptions.t,
+) => Webapi__Temporal__Types.duration = "since"
+@send external equals: (t, t) => bool = "equals"
+
+module ToStringOptions = {
+  type t
+
+  @obj
+  external make: (
+    ~offset: [#auto | #never]=?,
+    ~timeZoneName: [#auto | #never]=?,
+    ~calendarName: [#auto | #always | #never]=?,
+    ~fractionalSecondDigits: [#auto | #0 | #1 | #2 | #3 | #4 | #5 | #6 | #7 | #8 | #9]=?,
+    ~smallestUnit: [
+      | #minute
+      | #second
+      | #millisecond
+      | #microsecond
+      | #nanosecond
+    ]=?,
+    ~roundingMode: [#halfExpand | #ceil | #trunc | #floor]=?,
+    unit
+  ) => t = ""
+}
+
+@send external toString: t => string = "toString"
+@send external toStringWithOptions: (t, ToStringOptions.t) => string = "toString"
+// TODO: toLocaleString, need Intl bindings
+@send external toInstant: t => Webapi__Temporal__Types.instant = "toInstant"
+@send external toPlainDate: t => Webapi__Temporal__Types.plainDate = "toPlainDate"
+@send external toPlainTime: t => Webapi__Temporal__Types.plainTime = "toPlainTime"
+@send external toPlainDateTime: t => Webapi__Temporal__Types.plainDateTime = "toPlainDateTime"
+@send external toPlainYearMonth: t => Webapi__Temporal__Types.plainYearMonth = "toPlainYearMonth"
+@send external toPlainMonthDay: t => Webapi__Temporal__Types.plainMonthDay = "toPlainMonthDay"
+
+type isoFields = {
+  isoYear: int,
+  isoMonth: int,
+  isoDay: int,
+  hour: int,
+  minute: int,
+  second: int,
+  millisecond: int,
+  microsecond: int,
+  nanosecond: int,
+  offset: string,
+  timeZone: Webapi__Temporal__Types.timeZone,
+  calendar: Webapi__Temporal__Types.calendar,
+}
+
+@send external getISOFields: t => isoFields = "getISOFields"
diff --git a/src/Webapi/Webapi__Temporal.res b/src/Webapi/Webapi__Temporal.res
new file mode 100644
index 00000000..f63a8975
--- /dev/null
+++ b/src/Webapi/Webapi__Temporal.res
@@ -0,0 +1,8 @@
+module Calendar = Webapi__Temporal__Calendar
+module Duration = Webapi__Temporal__Duration
+module Instant = Webapi__Temporal__Instant
+module Now = Webapi__Temporal__Now
+module PlainDate = Webapi__Temporal__PlainDate
+module PlainTime = Webapi__Temporal__PlainTime
+module TimeZone = Webapi__Temporal__TimeZone
+module ZonedDateTime = Webapi__Temporal__ZonedDateTime