Sep 9, 1951, 1:00 am
| Start DST: | Sunday, May 2, 1948 — 1 hour forward |
|---|---|
| End DST: | Sunday, September 12, 1948 — 1 hour backward |
May 2
Forward 1 hour
May 2, 1948 - Daylight Saving Time Started
When local standard time was about to reach
Sunday, May 2, 1948, 12:00:00 midnight clocks were turned forward 1 hour to
Sunday, May 2, 1948, 1:00:00 am local daylight time instead.
Sunrise and sunset were about 1 hour later on May 2, 1948 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 12
Back 1 hour
Sep 12, 1948 - Daylight Saving Time Ended
When local daylight time was about to reach
Sunday, September 12, 1948, 1:00:00 am clocks were turned backward 1 hour to
Sunday, September 12, 1948, 12:00:00 midnight local standard time instead.
Sunrise and sunset were about 1 hour earlier on Sep 12, 1948 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 — 1947 | DST not observed | |
| 1948 | Sunday, May 2, 12:00 midnight | Sunday, September 12, 1:00 am |
| 1949 | Sunday, April 3, 12:00 midnight | Sunday, September 11, 1:00 am |
| All times are local for Tokyo. | ||