(Charles Krupa | AP file photo) Workers at the Electric Time Company in Medfield, Mass., test a 20-foot-high clock, built for the a new train station in Bangkok, Thailand, prior to packing and shipment on July 25, 2019. Daylight saving time ends at 2 a.m. local time Sunday, Nov. 3, 2019, when clocks are set back one hour. Losing an hour of daylight sounds like a gloomy preview for the dark winter months, and at least one study found an increase in people seeking help for depression after turning the clocks back to standard time in November _ in Scandinavia. But far more research says that the springtime start of daylight saving time may be more harmful, linking it with more car accidents, heart attacks in vulnerable people and other health problems that may persist throughout the time change.