dateutil
The dateutil module provides powerful extensions to the standard datetime module, available in Python.
https://dateutil.readthedocs.io/en/stable/
https://github.com/dateutil/dateutil/
MetPy Mondays
`#131 - dateutil : Unidata Developer's Blog
https://www.unidata.ucar.edu/blogs/developer/entry/metpy-mondays-131-dateutil
natural language dates
relative time deltas
parsing time