Forward 1 hour
When local standard time was about to reach
Thursday, January 4, 1973, 12:00:00 midnight clocks were turned forward 1 hour to
Thursday, January 4, 1973, 1:00:00 am local daylight time instead.
Sunrise and sunset were about 1 hour later on Jan 4, 1973 than the day before. There was more light in the evening.