Clock Changes in Montevideo, Uruguay 1974

Jan 13, 1974 - Daylight Saving Time Started

When local standard time was about to reach
Sunday, January 13, 1974, 12:00:00 midnight clocks were turned forward 1:30 hour to
Sunday, January 13, 1974, 1:30:00 am local daylight time instead.

Also called Spring Forward, Summer Time, and Daylight Savings Time.

Mar 10, 1974 - Daylight Saving Time Decreased

Double DST ended – Clocks were turned back from double DST (2 hours ahead of standard time) to DST (1 hour ahead of standard time).
When local daylight time was about to reach
Sunday, March 10, 1974, 12:00:00 midnight clocks were turned backward 1 hour to
Saturday, March 9, 1974, 11:00:00 pm local daylight time instead.

Sunrise and sunset were about 1 hour earlier on Mar 10, 1974 than the day before. There was more light in the morning and less light in the evening.

Also called Spring Forward, Summer Time, and Daylight Savings Time.

Sep 1, 1974 - Daylight Saving Time Ended

When local daylight time was about to reach
Sunday, September 1, 1974, 12:00:00 midnight clocks were turned backward 0:30 hours to
Saturday, August 31, 1974, 11:30:00 pm local standard time instead.

Also called Fall Back and Winter Time.