* ♻️ Refactor computing FastAPI People, include 3 months, 6 months, 1 year, based on comment date, not discussion date. PR [#11304](https://github.com/tiangolo/fastapi/pull/11304) by [@tiangolo](https://github.com/tiangolo).

            "timestamp": "not a date",
        },
    )
    assert response.status_code == 422
    assert response.json() == {
        "detail": [
            {
                "loc": ["body", "timestamp"],
                "msg": "Input should be a valid datetime or date, invalid character in year",
                "type": "datetime_from_date_parsing",
                "input": "not a date",

                                "type": "string",
                                "format": "date-time",
                            },
                            "end_datetime": {
                                "title": "End Datetime",
                                "type": "string",
                                "format": "date-time",
                            },
                            "repeat_at": {

from pydantic_core import PydanticUndefinedType

from ._compat import (
    Url,
    is_pydantic_v1_model_instance,
)


# Taken from Pydantic v1 as is
def isoformat(o: Union[datetime.date, datetime.time]) -> str:
    return o.isoformat()


# Adapted from Pydantic v1
# TODO: pv2 should this return strings instead?
def decimal_encoder(dec_value: Decimal) -> Union[int, float]:
    """