Mar 29, 2026, 12:00 midnight
| Start DST: | Sunday, March 27, 1977 — 1 hour forward |
|---|---|
| End DST: | Sunday, September 25, 1977 — 1 hour backward |
Mar 27
Forward 1 hour
Mar 27, 1977 - Daylight Saving Time Started
When local standard time was about to reach
Sunday, March 27, 1977, 12:00:00 midnight clocks were turned forward 1 hour to
Sunday, March 27, 1977, 1:00:00 am local daylight time instead.
Sunrise and sunset were about 1 hour later on Mar 27, 1977 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.
Sep 25
Back 1 hour
Sep 25, 1977 - Daylight Saving Time Ended
When local daylight time was about to reach
Sunday, September 25, 1977, 1:00:00 am clocks were turned backward 1 hour to
Sunday, September 25, 1977, 12:00:00 midnight local standard time instead.
Sunrise and sunset were about 1 hour earlier on Sep 25, 1977 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 — 1975 | DST observed all year | |
| 1976 | No DST Start | Sunday, September 26, 1:00 am |
| 1977 | Sunday, March 27, 12:00 midnight | Sunday, September 25, 1:00 am |
| 1978 | Sunday, April 2, 1:00 am | Sunday, October 1, 2:00 am |
| 1979 | Sunday, April 1, 1:00 am | Sunday, September 30, 2:00 am |
| All times are local for 39°43'29.9"N, 31°07'35.6"W. | ||
Data for the years before 1970 is not available for 39°43'29.9"N, 31°07'35.6"W, however, we have earlier time zone history for Angra do Heroísmo available.
Detailed time zone and clock changes in 39°43'29.9"N, 31°07'35.6"W