Back 1 hour
When local standard time was about to reach
Sunday, October 31, 1971, 3:00:00 am clocks were turned backward 1 hour to
Sunday, October 31, 1971, 2:00:00 am local standard time instead.
Sunrise and sunset were about 1 hour earlier on Oct 31, 1971 than the day before. There was more light in the morning.