Apr 24, 2026, 12:00 midnight
| Start DST: | Tuesday, May 1, 1973 — 1 hour forward |
|---|---|
| End DST: | Monday, October 1, 1973 — 1 hour backward |
May 1
Forward 1 hour
May 1, 1973 - Daylight Saving Time Started
When local standard time was about to reach
Tuesday, May 1, 1973, 1:00:00 am clocks were turned forward 1 hour to
Tuesday, May 1, 1973, 2:00:00 am local daylight time instead.
Sunrise and sunset were about 1 hour later on May 1, 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 1
Back 1 hour
Oct 1, 1973 - Daylight Saving Time Ended
When local daylight time was about to reach
Monday, October 1, 1973, 3:00:00 am clocks were turned backward 1 hour to
Monday, October 1, 1973, 2:00:00 am local standard time instead.
Sunrise and sunset were about 1 hour earlier on Oct 1, 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 | Friday, May 1, 1:00 am | Thursday, October 1, 3:00 am |
| 1971 | Saturday, May 1, 1:00 am | Friday, October 1, 3:00 am |
| 1972 | Monday, May 1, 1:00 am | Sunday, October 1, 3:00 am |
| 1973 | Tuesday, May 1, 1:00 am | Monday, October 1, 3:00 am |
| 1974 | Wednesday, May 1, 1:00 am | Tuesday, October 1, 3:00 am |
| 1975 | Thursday, May 1, 1:00 am | Wednesday, October 1, 3:00 am |
| 1976 | Saturday, May 1, 1:00 am | Friday, October 1, 3:00 am |
| 1977 | Sunday, May 1, 1:00 am | Saturday, October 1, 3:00 am |
| 1978 | Monday, May 1, 1:00 am | Sunday, October 1, 3:00 am |
| 1979 | Tuesday, May 1, 1:00 am | Monday, October 1, 3:00 am |
| All times are local for O Kolab. | ||
Data for the years before 1970 is not available for O Kolab, however, we have earlier time zone history for Cairo available.