fix(proxy/utils.py): fix reset monthly budget

fix to reset at the same time each month (not at start of month)

litellm/tests/test_utils.py

@@ -26,7 +26,11 @@ from litellm.utils import (
     get_max_tokens,
     get_supported_openai_params,
 )
-from litellm.proxy.utils import _duration_in_seconds, _extract_from_regex
+from litellm.proxy.utils import (
+    _duration_in_seconds,
+    _extract_from_regex,
+    get_last_day_of_month,
+)
 
 # Assuming your trim_messages, shorten_message_to_fit_limit, and get_token_count functions are all in a module named 'message_utils'
 
@@ -467,15 +471,31 @@ def test_duration_in_seconds():
 
     now = time.time()
     current_time = datetime.fromtimestamp(now)
-    print("current_time={}".format(current_time))
-    # Calculate the first day of the next month
+
     if current_time.month == 12:
-        next_month = datetime(year=current_time.year + 1, month=1, day=1)
+        target_year = current_time.year + 1
+        target_month = 1
     else:
-        next_month = datetime(
-            year=current_time.year, month=current_time.month + 1, day=1
-        )
-    print("next_month={}".format(next_month))
+        target_year = current_time.year
+        target_month = current_time.month + 1
+
+    # Determine the day to set for next month
+    target_day = current_time.day
+    last_day_of_target_month = get_last_day_of_month(target_year, target_month)
+
+    if target_day > last_day_of_target_month:
+        target_day = last_day_of_target_month
+
+    next_month = datetime(
+        year=target_year,
+        month=target_month,
+        day=target_day,
+        hour=current_time.hour,
+        minute=current_time.minute,
+        second=current_time.second,
+        microsecond=current_time.microsecond,
+    )
+
     # Calculate the duration until the first day of the next month
     duration_until_next_month = next_month - current_time
     expected_duration = int(duration_until_next_month.total_seconds())