Mar 30, 2025, 1:00 am
| Start DST: | Sunday, March 18, 1973 — 1 hour forward |
|---|---|
| End DST: | Sunday, October 28, 1973 — 1 hour backward |
Mar 18
Forward 1 hour
Mar 18, 1973 - Daylight Saving Time Started
When local standard time was about to reach
Sunday, March 18, 1973, 2:00:00 am clocks were turned forward 1 hour to
Sunday, March 18, 1973, 3:00:00 am local daylight time instead.
Sunrise and sunset were about 1 hour later on Mar 18, 1973 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 28
Back 1 hour
Oct 28, 1973 - Daylight Saving Time Ended
When local daylight time was about to reach
Sunday, October 28, 1973, 3:00:00 am clocks were turned backward 1 hour to
Sunday, October 28, 1973, 2:00:00 am local standard time instead.
Sunrise and sunset were about 1 hour earlier on Oct 28, 1973 than the day before. There was more light in the morning and less light in the evening.
Also called Fall Back and Winter Time.
Daylight Saving Time in Other Years
DST changes do not necessarily occur on the same date every year.
| Year | DST Start (Clock Forward) | DST End (Clock Backward) |
|---|---|---|
| 1970 | DST observed all year | |
| 1971 | No DST Start | Sunday, October 31, 3:00 am |
| 1972 | Sunday, March 19, 2:00 am | Sunday, October 29, 3:00 am |
| 1973 | Sunday, March 18, 2:00 am | Sunday, October 28, 3:00 am |
| 1974 | Sunday, March 17, 2:00 am | Sunday, October 27, 3:00 am |
| 1975 | Sunday, March 16, 2:00 am | Sunday, October 26, 3:00 am |
| 1976 | Sunday, March 21, 2:00 am | Sunday, October 24, 3:00 am |
| 1977 | Sunday, March 20, 2:00 am | Sunday, October 23, 3:00 am |
| 1978 | Sunday, March 19, 2:00 am | Sunday, October 29, 3:00 am |
| 1979 | Sunday, March 18, 2:00 am | Sunday, October 28, 3:00 am |
| All times are local for London. | ||