diff --git a/litellm/litellm_core_utils/duration_parser.py b/litellm/litellm_core_utils/duration_parser.py
index 70c28c4e06..f78cb9b1b0 100644
--- a/litellm/litellm_core_utils/duration_parser.py
+++ b/litellm/litellm_core_utils/duration_parser.py
@@ -12,6 +12,8 @@
 from typing import Optional, Tuple
 from zoneinfo import ZoneInfo
 
+from litellm._logging import verbose_logger
+
 
 def _extract_from_regex(duration: str) -> Tuple[int, str]:
     match = re.match(r"(\d+)(mo|[smhdw]?)", duration)
@@ -156,7 +158,11 @@ def _setup_timezone(
         else:
             tz = ZoneInfo(timezone_str)
     except Exception:
-        # If timezone is invalid, fall back to UTC
+        verbose_logger.warning(
+            "Failed to load timezone '%s', falling back to UTC. "
+            "Check that the timezone is valid and that the 'tzdata' package is installed.",
+            timezone_str,
+        )
         tz = timezone.utc
 
     # Convert current_time to the target timezone
diff --git a/tests/test_litellm/litellm_core_utils/test_duration_parser.py b/tests/test_litellm/litellm_core_utils/test_duration_parser.py
index 52316d4d97..e7c9c80cb4 100644
--- a/tests/test_litellm/litellm_core_utils/test_duration_parser.py
+++ b/tests/test_litellm/litellm_core_utils/test_duration_parser.py
@@ -1,5 +1,6 @@
 import unittest
 from datetime import datetime, timezone
+from unittest.mock import patch
 from zoneinfo import ZoneInfo
 
 from litellm.litellm_core_utils.duration_parser import get_next_standardized_reset_time
@@ -184,5 +185,14 @@ def test_dst_spring_forward(self):
         self.assertEqual(result, expected)
 
 
+    def test_invalid_timezone_logs_warning(self):
+        """Test that an invalid timezone logs a warning when falling back to UTC."""
+        base_time = datetime(2023, 5, 15, 14, 0, 0, tzinfo=timezone.utc)
+        with patch("litellm.litellm_core_utils.duration_parser.verbose_logger") as mock_logger:
+            get_next_standardized_reset_time("1d", base_time, "NonExistentTimeZone")
+            mock_logger.warning.assert_called_once()
+            assert "NonExistentTimeZone" in mock_logger.warning.call_args.args[1]
+
+
 if __name__ == "__main__":
     unittest.main()