**Bug Fixes**
Fixed regression in but in [date_format](https://mizani.readthedocs.io/en/stable/formatters.html#mizani.formatters.date_format) where it cannot deal with UTC [timezone](https://docs.python.org/3/library/datetime.html#datetime.timezone) from timezone [30](https://github.com/has2k1/mizani/issues/30).