diff --git a/src/items/offset.rs b/src/items/offset.rs
index c77ac08..ad2b359 100644
--- a/src/items/offset.rs
+++ b/src/items/offset.rs
@@ -338,6 +338,7 @@ fn timezone_name_to_offset(input: &str) -> ModalResult<(Offset, bool)> {
         "mez" => (false, 1, 0, true),
         "mesz" => (false, 2, 0, false),
         "mest" => (false, 2, 0, false),
+        "met" => (false, 1, 0, true),
         "mdt" => (true, 6, 0, false),
         "m" => (false, 12, 0, true),
         "l" => (false, 11, 0, true),
@@ -347,6 +348,8 @@ fn timezone_name_to_offset(input: &str) -> ModalResult<(Offset, bool)> {
         "ist" => (false, 5, 30, true),
         "i" => (false, 9, 0, true),
         "hst" => (true, 10, 0, true),
+        "hast" => (true, 10, 0, true),
+        "hadt" => (true, 9, 0, false),
         "h" => (false, 8, 0, true),
         "gst" => (false, 10, 0, true),
         "gmt" => (false, 0, 0, true),
diff --git a/tests/time.rs b/tests/time.rs
index d9b0828..e7445fc 100644
--- a/tests/time.rs
+++ b/tests/time.rs
@@ -133,6 +133,7 @@ fn test_time_zone_names() {
         ("MEZ", "2026-01-10 09:00", Some("2026-01-10 08:00")),
         ("MESZ", "2026-01-10 08:00", None),
         ("MEST", "2026-01-10 08:00", None),
+        ("MET", "2026-01-10 09:00", Some("2026-01-10 08:00")),
         ("MDT", "2026-01-10 16:00", None),
         ("M", "2026-01-09 22:00", Some("2026-01-09 21:00")),
         ("L", "2026-01-09 23:00", Some("2026-01-09 22:00")),
@@ -142,6 +143,8 @@ fn test_time_zone_names() {
         ("IST", "2026-01-10 04:30", Some("2026-01-10 03:30")),
         ("I", "2026-01-10 01:00", Some("2026-01-10 00:00")),
         ("HST", "2026-01-10 20:00", Some("2026-01-10 19:00")),
+        ("HAST", "2026-01-10 20:00", Some("2026-01-10 19:00")),
+        ("HADT", "2026-01-10 19:00", None),
         ("H", "2026-01-10 02:00", Some("2026-01-10 01:00")),
         ("GST", "2026-01-10 00:00", Some("2026-01-09 23:00")),
         ("GMT", "2026-01-10 10:00", Some("2026-01-10 09:00")),