Oct 30, 2022, 2:00 am
| Start DST: | Saturday, May 2, 1931 — 1 hour forward |
|---|---|
| End DST: | Wednesday, September 30, 1931 — 1 hour backward |
May 1
Forward 1 hour
May 1, 1931 - Daylight Saving Time Started
When local standard time was about to reach
Friday, May 1, 1931, 11:00:00 pm clocks were turned forward 1 hour to
Saturday, May 2, 1931, 12:00:00 midnight local daylight time instead.
Sunrise and sunset were about 1 hour later on May 2, 1931 than the day before. There was more light in the evening.
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.
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 | Friday, May 1, 11:00 pm | 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. | ||