Every spring and fall, millions of people go through the same ritual: a chorus of complaints about losing an hour of sleep or gaining one back, followed by a week of groggy morning

Every year, millions of people adjust their clocks twice—once in spring, once in autumn—and yet confusion persists. “When is Daylight Saving Time?” isn’t just a question about date

In everyday conversation, New York time usually refers to the local time in New York City. In practice, that local time follows the Eastern Time zone, which is used throughout New