Why are the clocks set one hour ahead on the first Sunday in April?

Clocks are set one hour ahead on the first Sunday in April to mark the beginning of Daylight Saving Time (DST). This practice aims to make better use of daylight during the longer days of spring and summer, effectively shifting an hour of daylight from the morning to the evening. The adjustment is intended to conserve energy, promote outdoor activities in the evening, and enhance overall productivity.