### Bug summary list of datetime passed to ax.plot results in a mypy error. The same error has been seen in ax.errorbar. ### Code for reproduction ```python import matplotlib.pyplot as plt from datetime import datetime ax = plt.axes() ax.plot([datetime.now()], [20.6], label="buggy") ``` ### Actual outcome Argument 1 to "plot" of "Axes" has incompatible type "list[datetime]"; expected "Union[float, Union[_SupportsArray[dtype[Any]], _NestedSequence[_SupportsArray[dtype[Any]]], bool, int, float, complex, str, bytes, _NestedSequence[Union[bool, int, float, complex, str, bytes]]], str]" [arg-type] ### Expected outcome no mypy errors ### Additional information _No response_ ### Operating system Windows 11 ### Matplotlib Version 3.8.0 ### Matplotlib Backend TkAgg ### Python version Python 3.9.13 ### Jupyter version NA ### Installation pip