If we want an actual fallback implementation for `timegm`, there are some...

[jimklimov]

          FYI, if we want an actual fallback implementation for `timegm`, there are some here:

https://stackoverflow.com/questions/16647819/timegm-cross-platform

The one from boost should be license compatible and easy to port.

Originally posted by @EchterAgo in #2184 (comment)