BerriAI/litellm · error · HTTPException

start_date and end_date must be in YYYY-MM-DD format

Error message

start_date and end_date must be in YYYY-MM-DD format

What it means

Error "start_date and end_date must be in YYYY-MM-DD format" thrown in BerriAI/litellm.

Source

Thrown at litellm/proxy/spend_tracking/spend_management_endpoints.py:1577

            status_code=status.HTTP_403_FORBIDDEN,
            detail="/spend/report endpoint " + CommonProxyErrors.not_premium_user.value,
        )
    return prisma_client


def _parse_spend_report_date_range(start_date: str | None, end_date: str | None) -> tuple[datetime, datetime]:
    if start_date is None or end_date is None:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="Please provide start_date and end_date",
        )
    try:
        parsed = (
            datetime.strptime(start_date, "%Y-%m-%d").replace(tzinfo=timezone.utc),
            datetime.strptime(end_date, "%Y-%m-%d").replace(tzinfo=timezone.utc),
        )
    except ValueError:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="start_date and end_date must be in YYYY-MM-DD format",
        )
    start_date_obj, end_date_obj = parsed
    if end_date_obj < start_date_obj:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="start_date must be on or before end_date",
        )
    if end_date_obj - start_date_obj > timedelta(days=_SPEND_REPORT_MAX_RANGE_DAYS):
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail=f"Date range too large; maximum is {_SPEND_REPORT_MAX_RANGE_DAYS} days",
        )
    return parsed


def _resolve_spend_report_scope(

View on GitHub (pinned to 77b7c6c40c)

Solutions

1. Format start_date and end_date as YYYY-MM-DD.

When it happens

Trigger: Thrown at litellm/proxy/spend_tracking/spend_management_endpoints.py:1577 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of BerriAI/litellm@77b7c6c40c (2026-08-18). Data as JSON: /api/errors/4c9d43dace230745. Report an issue: GitHub.