The official time change will take place promptly at 2:00 a.m. on Sunday, 3 November. That will be when Americans will have to turn their clocks back one hour. It is worth mentioning that not all ...

To determine the official time, the NRC uses atomic clocks, which are instruments that use microwave signals and atoms to provide the most accurate time known in the world. The NRC has a minimum ...

Here’s what else to know: When do we need to change our clocks? Sunday, Nov. 3, at 2 a.m. marks the official time to “fall back” for daylight saving time. This means clocks will “fall back ...