When Is 2024 Time Change. Daylight saving time will resume on march 10, 2024, with the second sunday in march marking the official date when clocks will spring forward. Before 1955, a second was defined as a specific fraction of the time the earth took to rotate once in relation to the stars.
Here’s everything to know about daylight savings time 2024, including when it might end. In atomic time, a second is defined as 9,192,631,770 oscillations of a cesium atom.