Mar 16, 2008, 12:00 midnight
| Start DST: | Wednesday, January 23, 1974 — 1 hour forward |
|---|---|
| End DST: | Tuesday, April 30, 1974 — 1 hour backward |
Jan 23
Forward 1 hour
Jan 23, 1974 - Daylight Saving Time Started
When local standard time was about to reach
Wednesday, January 23, 1974, 12:00:00 midnight clocks were turned forward 1 hour to
Wednesday, January 23, 1974, 1:00:00 am local daylight time instead.
Sunrise and sunset were about 1 hour later on Jan 23, 1974 than the day before. There was more light in the evening.
Also called Spring Forward, Summer Time, and Daylight Savings Time.
May 1
Back 1 hour
May 1, 1974 - Daylight Saving Time Ended
When local daylight time was about to reach
Wednesday, May 1, 1974, 12:00:00 midnight clocks were turned backward 1 hour to
Tuesday, April 30, 1974, 11:00:00 pm local standard time instead.
Sunrise and sunset were about 1 hour earlier on May 1, 1974 than the day before. There was more light in the morning.
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 — 1973 | DST not observed | |
| 1974 | Wednesday, January 23, 12:00 midnight | Wednesday, May 1, 12:00 midnight |
| 1975 — 1979 | DST not observed | |
| All times are local for San Martín Base. | ||
Data for the years before 1970 is not available for San Martín Base, however, we have earlier time zone history for Ushuaia available.