Next change:
Oct
26
1 hour
Back
Oct 26, 2025, 2:00 am
May 21
Forward 1 hour
May 21, 1916 - Daylight Saving Time Started
When local standard time was about to reach
Sunday, May 21, 1916, 2:00:00 am clocks were turned forward 1 hour to
Sunday, May 21, 1916, 3:00:00 am local daylight time instead.
Sunrise and sunset were about 1 hour later on May 21, 1916 than the day before. There was more light in the evening and less light in the morning.
Also called Spring Forward, Summer Time, and Daylight Savings Time.
Oct 1
Back 0:34:39 hours
Oct 1, 1916 - Daylight Saving Time Ended
When local daylight time was about to reach
Sunday, October 1, 1916, 3:00:00 am clocks were turned backward 0:34:39 hours to
Sunday, October 1, 1916, 2:25:21 am local standard time instead.
Also called Fall Back and Winter Time.
Daylight Saving Time History in Ireland
- Ireland first observed Daylight Saving Time in 1916.
- Ireland has observed DST for 107 years between 1916 and 2025.
- Previous time with no Daylight Saving Time was 1971.
- See Worldwide DST Statistics