SUMMARY:

In this thread, we created a few methods of randomly setting timezones:
o https://i.postimg.cc/pdV3pJCL/tz01.jpg

For completeness, we should summarize a few methods of timezone display:
o https://i.postimg.cc/pdV3pJCL/tz01.jpg

Namely...
1. Synchronize Windows 10 system time
a. Windows Settings Time & Language Date & time Related settings
b. Add clocks for different time zones Internet Time (tab)
c. [Change settings...]
d. [x]Synchronize with an Internet time server Server: time.windows.com

2. Display additional Windows 10 clocks
a. Windows Settings Time & Language Date & time Related settings
b. Add clocks for different time zones Additional Clocks (tab)
c. [x]Show this clock (Clock 1) Select time zone [choose desired tz]
d. [x]Show this clock (Clock 2) Select time zone [choose desired tz]

3. Set Windows 10 system time zone
a. Windows Settings Time & Language Date & time Related settings
b. Add clocks for different time zones Date and Time (tab)
c. Time zone [Change time zone...] [choose desired system tz]

Freeware tested:
1. clocx adds a simple but large round desktop clock of a chosen timezone.
http://www.clocx.net
2. dsclock adds a configurable desktop digital clock of a chosen timezone.
http://www.dualitysoft.com
3. T-clock simply replaces the taskbar clock (same system timezone choice).
https://github.com/White-Tiger/T-Clock/releases

If desired, we can modify the taskbar system clock display using freewa
o T-clock https://github.com/White-Tiger/T-Clock
which also has "line spacing" options that dsclock freeware doesn't offer.
https://windows-cdn.softpedia.com/screenshots/T-Clock-Redux_11.png
and which has a checkbox option to display the meridiem indicator or not:
https://windows-cdn.softpedia.com/screenshots/T-Clock-Redux_10.png
but, as far as I'm aware, T-Clock freeware is bound to the system clock.

Related threads:
o Do you know the font Windows 10 uses for the default Date & Time display?
https://groups.google.com/forum/#!topic/alt.comp.freeware/LmfYs2a4o0Q

o Can a Windows batch script perform the equivalent of a cat until the
end of file delimiter (cat foo eof)?
https://groups.google.com/forum/#!topic/alt.msdos.batch/0EE2VwfKwYc

o What method do you prefer for scheduling a batch file to run silently
[sans a command window displaying]?
https://groups.google.com/forum/#!topic/alt.comp.freeware/BDv1vWViJ80

Images for timezones:
o https://i.postimg.cc/pdV3pJCL/tz01.jpg
o https://i.postimg.cc/J0mLXN73/tz02.jpg
o https://i.postimg.cc/5NLJCznK/tz03.jpg
o https://i.postimg.cc/Gh62bnq0/tz04.jpg
Images for clocks:
o https://i.postimg.cc/Dy2mgsNq/clock01.jpg
o https://i.postimg.cc/9f6KJx4f/clock02.jpg
o Font = Segoe UI, semibold, 9, Western
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