Is there a fast way to switch System time zone from the command line?

Question

I usually do it through the System Preference panel for Date & Time, but I'd like a quicker way to do this if there is one.

Answer 1

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

Answer 2

Additionally:

Printing a random timezone:

ruby -e "puts `sudo systemsetup -listtimezones`.lines.sample.strip"

Setting a random timezone:

sudo systemsetup -settimezone (ruby -e "puts `sudo systemsetup -listtimezones`.lines.sample.strip")

Finding a timezone (e.g. containing "Los" in this case):

sudo printf ''; sudo systemsetup -listtimezones | grep Los