daylight saving
or daylight savings
noun
the practice of advancing standard time by one hour in the spring of each year and of setting it back by one hour in the fall in order to gain an extra period of daylight during the early evening.
Origin of daylight saving
First recorded in 1905–10
Words nearby daylight saving
dayglow,
dayhop,
daylight,
daylight lamp,
daylight robbery,
daylight saving,
daylight-saving time,
daylights,
daylily,
daylong,
daymare