British Summer Time noun
Learner's definition of BRITISH SUMMER TIME
[noncount] British
: a period of the year between spring and fall when clocks in the United Kingdom are set one hour ahead of Greenwich mean time英国夏令时间(春、秋季之间,英国时钟比格林尼治平时拨快一小时) — called also (British) Summer Time
— compare daylight saving time