Sep 15, 1991, 2:00 am
| Start DST: | Sunday, April 14, 1991 — 1 hour forward |
|---|---|
| End DST: | Sunday, September 15, 1991 — 1 hour backward |
Apr 14
Forward 1 hour
Apr 14, 1991 - Daylight Saving Time Started
When local standard time was about to reach
Sunday, April 14, 1991, 2:00:00 am clocks were turned forward 1 hour to
Sunday, April 14, 1991, 3:00:00 am local daylight time instead.
Sunrise and sunset were about 1 hour later on Apr 14, 1991 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 15
Back 1 hour
Sep 15, 1991 - Daylight Saving Time Ended
When local daylight time was about to reach
Sunday, September 15, 1991, 2:00:00 am clocks were turned backward 1 hour to
Sunday, September 15, 1991, 1:00:00 am local standard time instead.
Sunrise and sunset were about 1 hour earlier on Sep 15, 1991 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) |
|---|---|---|
| 1990 | Sunday, April 15, 2:00 am | Sunday, September 16, 2:00 am |
| 1991 | Sunday, April 14, 2:00 am | Sunday, September 15, 2:00 am |
| 1992 — 1999 | DST not observed | |
| All times are local for 31°12'46.7"N, 121°23'48.0"E. | ||
Data for the years before 1970 is not available for 31°12'46.7"N, 121°23'48.0"E, however, we have earlier time zone history for Shanghai available.
Detailed time zone and clock changes in 31°12'46.7"N, 121°23'48.0"E