gh-102450: Add ISO-8601 alternative for midnight to `fromisoformat()` calls. by TizzySaurus · Pull Request #105856 · python/cpython

>>> from datetime import datetime as c_datetime
>>> c_datetime.fromisoformat("2023-01-32T24:00:00")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: day is out of range for month

>>> from _pydatetime import datetime as py_datetime
>>> py_datetime.fromisoformat("2023-01-32T24:00:00")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/xxx/Documents/personal/cpython/Lib/_pydatetime.py", line 1906, in fromisoformat
    return cls(*(date_components + time_components))
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/xxx/Documents/personal/cpython/Lib/_pydatetime.py", line 1717, in __new__
    year, month, day = _check_date_fields(year, month, day)
                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/xxx/Documents/personal/cpython/Lib/_pydatetime.py", line 545, in _check_date_fields
    raise ValueError('day must be in 1..%d' % dim, day)
ValueError: ('day must be in 1..31', 32)