[Walkman]

https://dateutil.readthedocs.io

http://crsmithdev.com/arrow/

http://pythonhosted.org/pytz/

http://delorean.readthedocs.io

http://github.hubspot.com/sanetime/

https://github.com/zachwill/moment

https://docs.djangoproject.com/en/1.10/topics/i18n/timezones...

The most similar to this are Arrow and Delorean, maybe Django timezone if you use Django.

[sdispater]

So, basically, you haven't read any of my comments. Arrow is really flawed see https://pendulum.eustace.io/faq/#why-not-arrow and Delorean is not as complete feature-wise as Pendulum. Both of these libraries do not handle properly shifting time around DST transition times which is a big flaw in itself beacause it's not accurate.