Clocks for several time zones on macOS

I’ve moved to another time zone for a while, but the team stayed in Ukraine. After one more “damn, why is nobody on Slack!?” I real­ized I needed a clock with the office time close at hand. What did the job for me was a Chrome exten­sion, CaretTab. Now a new browser tab looks like this:

The moti­va­tional line at the top is optional. All the for­mats can be configured.

Update: I real­ized that open­ing a browser tab just to check the time isn’t always convenient. I want a second clock in the menu bar. I googled a solu­tion, the free Clocker app. The menu bar now looks like this: