Mar 16, 2008, 12:00 midnight
| End DST: | Saturday, March 3, 1990 — 1 hour backward |
|---|---|
| Start DST: | Sunday, October 21, 1990 — 1 hour forward |
Mar 4
Back 1 hour
Mar 4, 1990 - Daylight Saving Time Ended
When local daylight time was about to reach
Sunday, March 4, 1990, 12:00:00 midnight clocks were turned backward 1 hour to
Saturday, March 3, 1990, 11:00:00 pm local standard time instead.
Sunrise and sunset were about 1 hour earlier on Mar 4, 1990 than the day before. There was more light in the morning and less light in the evening.
Also called Fall Back and Winter Time.
Oct 21
Forward 1 hour
Oct 21, 1990 - Daylight Saving Time Started
When local standard time was about to reach
Sunday, October 21, 1990, 12:00:00 midnight clocks were turned forward 1 hour to
Sunday, October 21, 1990, 1:00:00 am local daylight time instead.
Sunrise and sunset were about 1 hour later on Oct 21, 1990 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.
Daylight Saving Time in Other Years
DST changes do not necessarily occur on the same date every year.
| Year | DST End (Clock Backward) | DST Start (Clock Forward) |
|---|---|---|
| 1990 | Sunday, March 4, 12:00 midnight | Sunday, October 21, 12:00 midnight |
| 1991 | Sunday, March 3, 12:00 midnight | Sunday, October 20, 12:00 midnight |
| 1992 | Sunday, March 1, 12:00 midnight | Sunday, October 18, 12:00 midnight |
| 1993 | Sunday, March 7, 12:00 midnight | No DST Start |
| 1994 — 1998 | DST not observed | |
| 1999 | No DST End | Sunday, October 3, 12:00 midnight |
| 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.