Daylight Saving Time ended at 2 a.m. Sunday, and that's when all clocks should have been turned back one hour.
The extra hour of sleep means an hour less of sunlight.
Tourneau's watch shop in Midtown Manhattan is winding back its clocks, all 8,000 of them, this weekend.
The store's directors say it takes about three days to finish the process.
As always at this time of year, the New York City Fire Department is reminding residents to change the batteries in their smoke alarms.
Firefighters also encourage residents to make sure their carbon monoxide detectors are working.