nick-desteffen/OSX UTC Time Zone

Created August 5, 2011 01:50

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Set Time zone in OSX to UTC

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OSX UTC Time Zone

sudo ln -sf /usr/share/zoneinfo/UTC /etc/localtime

ad-si commented May 21, 2019

There is also sudo systemsetup -settimezone GMT.
Not sure what difference it makes …

j-walker23 commented Jul 24, 2019

Does removing the link revert it back?

a2f0 commented Jul 24, 2019 •

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@j-walker23 just setting it in the system preferences updates the symlink, I verified it.

j-walker23 commented Jul 27, 2019 •

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@deepeeess Thanks for the response! I was looking for a easy progrmatic way to flip back and forth. Which I'm sure there is.

psyanite commented Apr 16, 2020

life saver

coutoluizf commented Apr 19, 2020

Perfect, thanks !!!

vthinkhat commented Apr 20, 2020

Works for macOS Mojave Verison 10.14.6 (18G103). Thanks

kumar303 commented Apr 24, 2020

I verified that selecting UTC - United Kingdom in the Date & Time panel on macOS 10.14.6 really does set it to UTC and not to UK time, which could be UTC+1 during daylight savings.

BASoapbox commented Apr 30, 2020

Hi all! I am having issues with meeting invites from my client in Dubai and I live in UK. While the invite says 4PM AST (Arabian Standard Time) is shows up at 2PM UK time, but should be 1PM UK time. Any fix you can suggest?

paul3412 commented Jul 13, 2020 •

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works on MacOs Mojave thanks !
any tip to revert this (in case i need to in the future)

Gerst20051 commented Mar 15, 2022 •

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Command To See What Your Local Time Is Currently Set To:

[$]> ls -la /etc/localtime

/etc/localtime -> /var/db/timezone/zoneinfo/America/Los_Angeles

Command To Set Your Local Time To UTC

[$]> sudo ln -sf /usr/share/zoneinfo/UTC /etc/localtime

NOTE: When I Set It To UTC - United Kingdom Via System Preferences It Becomes:

[$]> ls -la /etc/localtime

/etc/localtime -> /var/db/timezone/zoneinfo/UTC

Command To Switch Your Local Time Back To The Original Time Zone

[$]> sudo ln -sf /var/db/timezone/zoneinfo/America/Los_Angeles /etc/localtime

FYI: I Compared Both Of The UTC Files And They Are Exactly Matching

[$]> delta /usr/share/zoneinfo/UTC /var/db/timezone/zoneinfo/UTC
or
[$]> diff /usr/share/zoneinfo/UTC /var/db/timezone/zoneinfo/UTC

[$]> cat /usr/share/zoneinfo/UTC /var/db/timezone/zoneinfo/UTC

TZif2UTCTZif2UTC
UTC0
TZif2UTCTZif2UTC
UTC0

I created the following shell aliases to make switching timezones easy.

# output the current timezone
alias timezone.current='exa -l /etc/localtime'

# set the timezone to my default local timezone
alias timezone.default='sudo ln -sf /var/db/timezone/zoneinfo/America/Los_Angeles /etc/localtime'

# set the timezone to utc
alias timezone.utc='sudo ln -sf /var/db/timezone/zoneinfo/UTC /etc/localtime'

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