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Boston is in the Eastern time zone, 3 hours ahead of Los Angeles, 1 hour ahead of Chicago, 5 hours behind London, and 15 hours behind Sydney. Daylight Savings Time (DST) is observed. DST begins the second Sunday in March, when clocks are set ahead one hour, and ends the first Sunday in November, when clocks are set back an hour (tip for remembrance: "Spring forward, and Fall behind").