Clocks not changed
but standard time zone is changed | When local standard time is about to reach
Midnight between Saturday, October 2, 1999 and Sunday, October 3, 1999
the standard time zone offset is changed from
UTC/GMT -3 hours to
UTC/GMT -4 hours
and at the same time daylight saving time started Seconds before and after the change:
| Local time | DST? | UTC offset | Zone name |
|---|
| Saturday, October 2, 1999 at 11:59:57 PM | No | -3 hours | ART | | Saturday, October 2, 1999 at 11:59:58 PM | No | -3 hours | ART | | Saturday, October 2, 1999 at 11:59:59 PM | No | -3 hours | ART | | Midnight between Saturday, October 2, 1999 and Sunday, October 3, 1999 | 1 hour | -3 hours | ARST | | Sunday, October 3, 1999 at 12:00:01 AM | 1 hour | -3 hours | ARST | | Sunday, October 3, 1999 at 12:00:02 AM | 1 hour | -3 hours | ARST |
|
|---|
