Apple - How do I get two status-bar clocks with different timezones?
Status clock is free, and available from the mac app store:
https://itunes.apple.com/us/app/status-clock/id552792489?mt=12
Worth a look too: https://github.com/palaniraja/mclock
Note: Loversclock, mentioned in another post, didn't download.
There is a free option. Install BitBar and then the World Clock plugin from:
https://getbitbar.com/plugins/Time/worldclock.1s.sh
I would also really like to display multiple times in my menu bar, but I'm not able to find anything like that either. I landed on Clocker. It's free and you can easily assign a keyboard shortcut which is really nice.