feat: add Asia/Bangkok timezone support for budget resets

- Add Asia/Bangkok (UTC+7) to timezone_map in duration_parser.py
- Update documentation to include Bangkok in common timezone values
- Add test case to verify Bangkok timezone functionality

Author: michaeltansg

docs/my-website/docs/proxy/budget_reset_and_tz.md

@@ -29,5 +29,6 @@ Common timezone values:
 - `US/Pacific` - Pacific Time
 - `Europe/London` - UK Time
 - `Asia/Kolkata` - Indian Standard Time (IST)
+- `Asia/Bangkok` - Indochina Time (ICT)
 - `Asia/Tokyo` - Japan Standard Time
 - `Australia/Sydney` - Australian Eastern Time

litellm/litellm_core_utils/duration_parser.py

@@ -158,6 +158,7 @@ def _setup_timezone(
                 "US/Eastern": timezone(timedelta(hours=-4)),  # EDT
                 "US/Pacific": timezone(timedelta(hours=-7)),  # PDT
                 "Asia/Kolkata": timezone(timedelta(hours=5, minutes=30)),  # IST
+                "Asia/Bangkok": timezone(timedelta(hours=7)),  # ICT (Indochina Time)
                 "Europe/London": timezone(timedelta(hours=1)),  # BST
                 "UTC": timezone.utc,
             }

tests/test_litellm/litellm_core_utils/test_duration_parser.py

@@ -88,6 +88,12 @@ def test_timezone_handling(self):
         )
         self.assertEqual(london_result, london_expected)
 
+        # Test Bangkok timezone (UTC+7): 5:30 AM next day, so next reset is midnight the day after
+        bangkok = ZoneInfo("Asia/Bangkok")
+        bangkok_expected = datetime(2023, 5, 17, 0, 0, 0, tzinfo=bangkok)
+        bangkok_result = get_next_standardized_reset_time("1d", base_time, "Asia/Bangkok")
+        self.assertEqual(bangkok_result, bangkok_expected)
+
     def test_edge_cases(self):
         """Test edge cases and boundary conditions"""
         # Exactly on hour boundary