Mac OS X - Terminal commands for changing time zones in the machine

changing_time_zones.sh

# Useful for testing things that are time zone
# sensitive - like scheduling things

# Get current timezone
sudo systemsetup -gettimezone

# Get list of available timezones
sudo systemsetup -listtimezones

# Set the timezone to the selected timezone
# sudo systemsetup -settimezone <timezone>
sudo systemsetup -settimezone America/New_York 
sudo systemsetup -settimezone Europe/Paris 

Good morning ddre54
No, there will be nolist by UTC... only google and manual check-out will give you the list but there exist DST (summer time) which is also linked to the city... so at winter it can be different timezone:)
When you set time like this (from terminal) for cities which not listed in common list (check "world time" section where you can add extra clock) and after you go to settings - date and time, you can see that the timezone city is Head office California (do not remember exactly) and you will not be able to change the timezone any more from settings window, only from terminal. You will be able to change it again by setting "approved list" city from terminal, then list from "settings window" will be restored back to normal.
But what to do with iphone or ipad? Over there I am not able to "cheat" like on mac🤔
"I have a dream" (C) that one day Apple will fix that🤓

Thank U! It's work for me.