Mar 29, 2026, 1:00 am
| Start DST: | Sunday, March 15, 1942 — 1 hour forward |
|---|---|
| Increase DST: | Sunday, April 26, 1942 — 1 hour forward |
Mar 14
Forward 1 hour
Mar 14, 1942 - Daylight Saving Time Started
When local standard time was about to reach
Saturday, March 14, 1942, 11:00:00 pm clocks were turned forward 1 hour to
Sunday, March 15, 1942, 12:00:00 midnight local daylight time instead.
Sunrise and sunset were about 1 hour later on Mar 15, 1942 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.
Apr 25
Forward 1 hour
Apr 25, 1942 - Daylight Saving Time Increased
Double DST – Clocks were turned ahead another hour when DST was already in force (2 hours ahead of standard time).
When local daylight time was about to reach
Saturday, April 25, 1942, 11:00:00 pm clocks were turned forward 1 hour to
Sunday, April 26, 1942, 12:00:00 midnight local daylight time instead.
Sunrise and sunset were about 1 hour later on Apr 26, 1942 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.
Aug 16
Back 1 hour
Aug 16, 1942 - Daylight Saving Time Decreased
Double DST ended – Clocks were turned back from double DST (2 hours ahead of standard time) to DST (1 hour ahead of standard time).
When local daylight time was about to reach
Sunday, August 16, 1942, 12:00:00 midnight clocks were turned backward 1 hour to
Saturday, August 15, 1942, 11:00:00 pm local daylight time instead.
Sunrise and sunset were about 1 hour earlier on Aug 16, 1942 than the day before. There was more light in the morning and less light in the evening.
Also called Spring Forward, Summer Time, and Daylight Savings Time.
Oct 25
Back 1 hour
Oct 25, 1942 - Daylight Saving Time Ended
When local daylight time was about to reach
Sunday, October 25, 1942, 12:00:00 midnight clocks were turned backward 1 hour to
Saturday, October 24, 1942, 11:00:00 pm local standard time instead.
Sunrise and sunset were about 1 hour earlier on Oct 25, 1942 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) |
|---|---|---|
| 1925 | DST not observed | |
| 1926 | Saturday, April 17, 11:00 pm | Sunday, October 3, 12:00 midnight |
| 1927 | Saturday, April 9, 11:00 pm | Sunday, October 2, 12:00 midnight |
| 1928 | Saturday, April 14, 11:00 pm | Sunday, October 7, 12:00 midnight |
| 1929 | Saturday, April 20, 11:00 pm | Sunday, October 6, 12:00 midnight |
| 1930 | DST not observed | |
| 1931 | Saturday, April 18, 11:00 pm | Sunday, October 4, 12:00 midnight |
| 1932 | Saturday, April 2, 11:00 pm | Sunday, October 2, 12:00 midnight |
| 1933 | DST not observed | |
| 1934 | Saturday, April 7, 11:00 pm | Sunday, October 7, 12:00 midnight |
| 1935 | Saturday, March 30, 11:00 pm | Sunday, October 6, 12:00 midnight |
| 1936 | Saturday, April 18, 11:00 pm | Sunday, October 4, 12:00 midnight |
| 1937 | Saturday, April 3, 11:00 pm | Sunday, October 3, 12:00 midnight |
| 1938 | Saturday, March 26, 11:00 pm | Sunday, October 2, 12:00 midnight |
| 1939 | Saturday, April 15, 11:00 pm | Sunday, November 19, 12:00 midnight |
| 1940 | Saturday, February 24, 11:00 pm | Sunday, October 6, 12:00 midnight |
| 1941 | Saturday, April 5, 11:00 pm | Monday, October 6, 12:00 midnight |
| * 1942 | Saturday, March 14, 11:00 pm | Sunday, October 25, 12:00 midnight |
| * 1943 | Saturday, March 13, 11:00 pm | Sunday, October 31, 12:00 midnight |
| * 1944 | Saturday, March 11, 11:00 pm | Sunday, October 29, 12:00 midnight |
| * 1945 | Saturday, March 10, 11:00 pm | Sunday, October 28, 12:00 midnight |
| 1946 | Saturday, April 6, 11:00 pm | Sunday, October 6, 12:00 midnight |
| 1947 | Sunday, April 6, 2:00 am | Sunday, October 5, 3:00 am |
| 1948 | Sunday, April 4, 2:00 am | Sunday, October 3, 3:00 am |
| 1949 | Sunday, April 3, 2:00 am | Sunday, October 2, 3:00 am |
| All times are local for Lisbon. * All or part of this period was on double DST. |
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