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I'm trying to set wake timer with this command

sudo rtcwake -m no -l -t `date +%s -d"2015-09-03 07:00"`

This should wake my computer tomorrow 7am right? However this is the result:

rtcwake: wakeup using /dev/rtc0 at Thu Sep  3 10:00:00 2015

10am really? I type date and system shows correct time but why is it setting ridiculous times here? I know this has something to do with UTC but I don't know what to do. My bios shows correct time, OS shows correct time.

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  • Please provide the output of the command sudo hwclock --localtime --show --debug
    – tuxar
    Sep 13, 2015 at 19:08
  • hwclock from util-linux 2.20.1 Using /dev interface to clock. Assuming hardware clock is kept in local time. Waiting for clock tick... ...got clock tick Time read from Hardware Clock: 2015/09/13 19:12:41 Hw clock time : 2015/09/13 19:12:41 = 1442160761 seconds since 1969 Sun 13 Sep 2015 07:12:41 PM EEST -0.438437 seconds
    – emrecnl
    Sep 13, 2015 at 19:13
  • Please check your /etc/default/rcS for UTC=no to make Linux use 'Local' time
    – tuxar
    Sep 13, 2015 at 20:20

1 Answer 1

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solution: As Tuxar shared his idea, solution is to disable UTC* (Universal Time Zone)

Let's edit this file and disable it

sudo nano /etc/default/rcS

Take a look at this screen shot https://i.stack.imgur.com/Grpsm.png And edit the line for UTC setting, set it to UTC=no. Then ctrl+x to save, press y key to accept and press enter. At this point you might wanna logout log back in. I rebooted just in case changes are applied.
Now rtcwake should be using correct time zone.

*tl;dr UTC is an unnecessary invention by "scientists" to replace saying GMT.

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