You are reading an old version of the documentation (v3.1.0). For the latest version see https://matplotlib.org/stable/
Version 3.1.0
matplotlib
Fork me on GitHub

matplotlib.axis.XAxis.axis_date

XAxis.axis_date(self, tz=None)

Sets up x-axis ticks and labels that treat the x data as dates.

Parameters:
tz : tzinfo or str or None

The timezone used to create date labels.