Daylight saving time in which clocks are set two hours ahead of standard time, used in Britain during the Second World War.
双重夏令时间（英国于第二次世界大战期间使用，比标准时间提前两个小时）
Example sentencesExamples
During the Second World War, double summer time (2 hours in advance of GMT) was introduced and was used for the period when, normally ordinary summer time would have been in force.