Sunday, , am local daylight time instead. Sunrise and sunset were about hour later on than the day before. There was more light in the evening. Also called Spring Forward, Summer Time, and Daylight Savings Time..US dependencies do not use Daylight Saving Time DST . Daylight Saving Time History in United States. United States first observed Daylight Saving Time in . United States has observed DST for years between DST in at least one location . See Worldwide DST Statistics DST in the USA Today.Daylight saving time DST , also daylight savings time or daylight time United States and summer time United Kingdom, European Union, and others , is the practice of advancing clocks during summer months so that darkness falls later each day according to the clock..Daylight Saving Time is the practice of moving the clock forward by one hour at the beginning of spring and moving it back one hour in fall. The aim is to make use of daylight longer into the evening by starting daylight an hour later in the morning..