daylight saving time

Từ điển Oxford Advanced Learner 8th

ˌdaylight ˈsaving time [daylight saving time] BrE NAmE (abbr.DST) (also ˈdaylight time) (both NAmE) (BrE ˈsummer time) noun uncountable
the period during which in some countries the clocks are put forward one hour, so that it is light for an extra hour in the evening
See also: ↑summer time