Summer time officially ends tonight.
The clocks go back at 2am, giving most of us an extra hour in bed.
The Minister for Justice Alan Shatter is reminding people to put their clocks back.
All clocks and watches should be put back one hour.
Minister Shatter is asking people not to let the extra hour "pass us by unacknowledged", asking people to "Carpe Horam", which means "Seize the Hour".
Winter time will continue until 30th March 2014.
