diff --git a/Tests/LibTimeZone/TestTimeZone.cpp b/Tests/LibTimeZone/TestTimeZone.cpp
index 01f805872f..946ea5b0d0 100644
--- a/Tests/LibTimeZone/TestTimeZone.cpp
+++ b/Tests/LibTimeZone/TestTimeZone.cpp
@@ -69,4 +69,19 @@ TEST_CASE(time_zone_to_string_link)
     EXPECT_EQ(TimeZone::time_zone_to_string(TimeZone::TimeZone::Etc_Universal), "Etc/UTC"sv);
 }
 
+TEST_CASE(canonicalize_time_zone)
+{
+    EXPECT_EQ(TimeZone::canonicalize_time_zone("America/New_York"sv), "America/New_York"sv);
+    EXPECT_EQ(TimeZone::canonicalize_time_zone("AmErIcA/NeW_YoRk"sv), "America/New_York"sv);
+
+    EXPECT_EQ(TimeZone::canonicalize_time_zone("UTC"sv), "UTC"sv);
+    EXPECT_EQ(TimeZone::canonicalize_time_zone("GMT"sv), "UTC"sv);
+    EXPECT_EQ(TimeZone::canonicalize_time_zone("GMT+0"sv), "UTC"sv);
+    EXPECT_EQ(TimeZone::canonicalize_time_zone("GMT-0"sv), "UTC"sv);
+    EXPECT_EQ(TimeZone::canonicalize_time_zone("Etc/UTC"sv), "UTC"sv);
+    EXPECT_EQ(TimeZone::canonicalize_time_zone("Etc/GMT"sv), "UTC"sv);
+
+    EXPECT(!TimeZone::canonicalize_time_zone("I don't exist"sv).has_value());
+}
+
 #endif
diff --git a/Userland/Libraries/LibTimeZone/TimeZone.cpp b/Userland/Libraries/LibTimeZone/TimeZone.cpp
index fc1fc6065d..767bdc3c3f 100644
--- a/Userland/Libraries/LibTimeZone/TimeZone.cpp
+++ b/Userland/Libraries/LibTimeZone/TimeZone.cpp
@@ -11,4 +11,17 @@ namespace TimeZone {
 Optional<TimeZone> __attribute__((weak)) time_zone_from_string(StringView) { return {}; }
 StringView __attribute__((weak)) time_zone_to_string(TimeZone) { return {}; }
 
+Optional<StringView> canonicalize_time_zone(StringView time_zone)
+{
+    auto maybe_time_zone = time_zone_from_string(time_zone);
+    if (!maybe_time_zone.has_value())
+        return {};
+
+    auto canonical_time_zone = time_zone_to_string(*maybe_time_zone);
+    if (canonical_time_zone.is_one_of("Etc/UTC"sv, "Etc/GMT"sv))
+        return "UTC"sv;
+
+    return canonical_time_zone;
+}
+
 }
diff --git a/Userland/Libraries/LibTimeZone/TimeZone.h b/Userland/Libraries/LibTimeZone/TimeZone.h
index 63cc1e49a9..c280618846 100644
--- a/Userland/Libraries/LibTimeZone/TimeZone.h
+++ b/Userland/Libraries/LibTimeZone/TimeZone.h
@@ -14,5 +14,6 @@ namespace TimeZone {
 
 Optional<TimeZone> time_zone_from_string(StringView time_zone);
 StringView time_zone_to_string(TimeZone time_zone);
+Optional<StringView> canonicalize_time_zone(StringView time_zone);
 
 }