Link world clock and phone number

It would be great if you could link your WORLD CLOCK to the clients PHONE NUMBER. Therefore, not having to enter the time zone, as it automatically finds it from the country code (as the flag is already present, the country is known to the board).
Of course there are cases where the number and timezone will not correlate, but having this an option increases the slickness.

I think there is a simple solution for your problem.
There is an online world clock. It can show you 400+ cities times with DST. It is a digital world clock with seconds, has an alarm for every city and you can save the list of your interested cities without any login!. Please check it once!

You can also install it as an app using web browser (web browsers provide a tool to install any website as an app)