Oct 30, 2022, 2:00 am
| Start DST: | Thursday, April 30, 1931 — 1 hour forward |
|---|---|
| End DST: | Wednesday, September 30, 1931 — 1 hour backward |
Apr 30
Forward 1 hour
Apr 30, 1931 - Daylight Saving Time Started
When local standard time was about to reach
Thursday, April 30, 1931, 12:00:00 midnight clocks were turned forward 1 hour to
Thursday, April 30, 1931, 1:00:00 am local daylight time instead.
Sunrise and sunset were about 1 hour later on Apr 30, 1931 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, 1931 - Daylight Saving Time Ended
When local daylight time was about to reach
Thursday, October 1, 1931, 12:00:00 midnight clocks were turned backward 1 hour to
Wednesday, September 30, 1931, 11:00:00 pm local standard time instead.
Sunrise and sunset were about 1 hour earlier on Oct 1, 1931 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 — 1930 | DST not observed | |
| 1931 | Thursday, April 30, 12:00 midnight | Thursday, October 1, 12:00 midnight |
| 1932 — 1938 | DST not observed | |
| 1939 | Sunday, February 5, 12:00 midnight | Sunday, June 25, 12:00 midnight |
| 1940 | Monday, December 9, 12:00 midnight | No DST End |
| 1941 | No DST Start | Tuesday, April 1, 12:00 midnight |
| 1942 | DST not observed | |
| 1943 | Thursday, December 16, 12:00 midnight | No DST End |
| 1944 | No DST Start | Monday, May 1, 12:00 midnight |
| 1945 — 1949 | DST not observed | |
| All times are local for Mexico City. | ||