Is there a fast way to switch System time zone from the command line? I usually do it through the System Preference panel for Date &amp; Time, but I'd like a quicker way to do this if there is one.
Use the following Terminal command:

sudo systemsetup -settimezone timezone


For a list of valid timezone values, use sudo systemsetup -listtimezones.

To get the current timezone, use:

sudo systemsetup -gettimezone