Oct 21, 1979, 3:30 am
| Start DST: | Sunday, April 19, 1970 — 1 hour forward |
|---|---|
| End DST: | Sunday, October 18, 1970 — 1 hour backward |
Apr 19
Forward 1 hour
Apr 19, 1970 - Daylight Saving Time Started
When local standard time was about to reach
Sunday, April 19, 1970, 3:30:00 am clocks were turned forward 1 hour to
Sunday, April 19, 1970, 4:30:00 am local daylight time instead.
Sunrise and sunset were about 1 hour later on Apr 19, 1970 than the day before. There was more light in the evening.
Also called Spring Forward, Summer Time, and Daylight Savings Time.
Oct 18
Back 1 hour
Oct 18, 1970 - Daylight Saving Time Ended
When local daylight time was about to reach
Sunday, October 18, 1970, 3:30:00 am clocks were turned backward 1 hour to
Sunday, October 18, 1970, 2:30:00 am local standard time instead.
Sunrise and sunset were about 1 hour earlier on Oct 18, 1970 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) |
|---|---|---|
| 1970 | Sunday, April 19, 3:30 am | Sunday, October 18, 3:30 am |
| 1971 | Sunday, April 18, 3:30 am | Sunday, October 17, 3:30 am |
| 1972 | Sunday, April 16, 3:30 am | Sunday, October 22, 3:30 am |
| * 1973 | Sunday, April 22, 3:30 am | Sunday, October 21, 3:30 am |
| 1974 | No DST Start | Sunday, October 20, 3:30 am |
| 1975 | Sunday, April 20, 3:30 am | Sunday, October 19, 3:30 am |
| 1976 | Sunday, April 18, 3:30 am | Sunday, October 17, 3:30 am |
| 1977 — 1978 | DST not observed | |
| 1979 | Sunday, May 13, 3:30 am | Sunday, October 21, 3:30 am |
| All times are local for 22°14'52"N, 114°12'10"E. * All or part of this period was on double DST. | ||
Data for the years before 1970 is not available for 22°14'52"N, 114°12'10"E, however, we have earlier time zone history for Hong Kong available.
Detailed time zone and clock changes in 22°14'52"N, 114°12'10"E