diff --git a/Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTimeConstructor.cpp b/Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTimeConstructor.cpp
index ffc5320069..71b807f2c9 100644
--- a/Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTimeConstructor.cpp
+++ b/Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTimeConstructor.cpp
@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2021, Linus Groh <linusg@serenityos.org>
+ * Copyright (c) 2021, Luke Wilde <lukew@serenityos.org>
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
@@ -31,6 +32,7 @@ void ZonedDateTimeConstructor::initialize(GlobalObject& global_object)
 
     u8 attr = Attribute::Writable | Attribute::Configurable;
     define_native_function(vm.names.from, from, 1, attr);
+    define_native_function(vm.names.compare, compare, 2, attr);
 
     define_direct_property(vm.names.length, Value(2), Attribute::Configurable);
 }
@@ -97,4 +99,17 @@ JS_DEFINE_NATIVE_FUNCTION(ZonedDateTimeConstructor::from)
     return TRY(to_temporal_zoned_date_time(global_object, item, options));
 }
 
+// 6.2.3 Temporal.ZonedDateTime.compare ( one, two ), https://tc39.es/proposal-temporal/#sec-temporal.zoneddatetime.compare
+JS_DEFINE_NATIVE_FUNCTION(ZonedDateTimeConstructor::compare)
+{
+    // 1. Set one to ? ToTemporalZonedDateTime(one).
+    auto* one = TRY(to_temporal_zoned_date_time(global_object, vm.argument(0)));
+
+    // 2. Set two to ? ToTemporalZonedDateTime(two).
+    auto* two = TRY(to_temporal_zoned_date_time(global_object, vm.argument(1)));
+
+    // 3. Return 𝔽(! CompareEpochNanoseconds(one.[[Nanoseconds]], two.[[Nanoseconds]])).
+    return Value(compare_epoch_nanoseconds(one->nanoseconds(), two->nanoseconds()));
+}
+
 }
diff --git a/Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTimeConstructor.h b/Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTimeConstructor.h
index b18744d597..87ce8ae875 100644
--- a/Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTimeConstructor.h
+++ b/Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTimeConstructor.h
@@ -25,6 +25,7 @@ private:
     virtual bool has_constructor() const override { return true; }
 
     JS_DECLARE_NATIVE_FUNCTION(from);
+    JS_DECLARE_NATIVE_FUNCTION(compare);
 };
 
 }
diff --git a/Userland/Libraries/LibJS/Tests/builtins/Temporal/ZonedDateTime/ZonedDateTime.compare.js b/Userland/Libraries/LibJS/Tests/builtins/Temporal/ZonedDateTime/ZonedDateTime.compare.js
new file mode 100644
index 0000000000..e35fbdfb6e
--- /dev/null
+++ b/Userland/Libraries/LibJS/Tests/builtins/Temporal/ZonedDateTime/ZonedDateTime.compare.js
@@ -0,0 +1,15 @@
+describe("correct behavior", () => {
+    test("length is 2", () => {
+        expect(Temporal.ZonedDateTime.compare).toHaveLength(2);
+    });
+
+    test("basic functionality", () => {
+        const zonedDateTimeOne = new Temporal.ZonedDateTime(1n, new Temporal.TimeZone("UTC"));
+        const zonedDateTimeTwo = new Temporal.ZonedDateTime(2n, new Temporal.TimeZone("UTC"));
+
+        expect(Temporal.ZonedDateTime.compare(zonedDateTimeOne, zonedDateTimeOne)).toBe(0);
+        expect(Temporal.ZonedDateTime.compare(zonedDateTimeTwo, zonedDateTimeTwo)).toBe(0);
+        expect(Temporal.ZonedDateTime.compare(zonedDateTimeOne, zonedDateTimeTwo)).toBe(-1);
+        expect(Temporal.ZonedDateTime.compare(zonedDateTimeTwo, zonedDateTimeOne)).toBe(1);
+    });
+});