When local standard time is about to reach
Sunday, March 11, 2018, 2:00:00 am clocks are turned forward 1 hour to 
Sunday, March 11, 2018, 3:00:00 am local daylight time instead.

Sunrise and sunset will be about 1 hour later on Mar 11, 2018 than the day before. There will be more light in the evening.

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