I just hacked a weekend project to help teams and individuals to track different timezones on one simple page.
Based on the current events, I think most people are working remotely and I think this will help people to track the timezones in a simple way. No need for signups or installing yet another app.
I'm also planning to build a feature to create a simple sharable page with all the team timezones so that everyone can track easily.
Feedbacks are welcome. And don't forget to share it :)
You can check it out here