[Feature] Channel-web doesn't save user timezone

[dmytropanontko]

I'm working on broadcast module. I've found that channel-web doesn't save user timezone.

Hint: If I understand right user timezone can be from -12 to +14.

[slvnperron]

You're right – we don't have the notion of timezone anymore. We should use the user properties for that, and the web channel should provide the timezone from the browser (if available)

[EFF]

We then could / should use the provided tz for time based entity extraction.