Time zone to convert to

[rmsrosa]

It seems we need another argument in tz convert <date_time_spec> to tell the bot which time zone(s) to convert the date_time_spec to. Maybe tz convert <date_time_spec> <target_time_zones>...

If empty, it can take the current default cities. Or, if possible, it can try to infer the time-zone of the user issuing the command.

And we can dd some special aliases, like mods, grakln, so it converts to the time-zone of all the mods or of all the people involved in a project.

[tk3369]

The intended usage of the tz command is to communicate clearly to everyone a meeting time.

We had a couple of meetings (mod meeting, grakn meeting, etc.) and people come from various timezones, making it difficult to understand each other what the exact meeting time is.

I don't mind making it a more general converter and provide more functionalities. As usual, PRs are welcome!

[tk3369]

Closing this issue. See new proposed changes at #95