Spring Begins 2025 Date And Time. The first day of spring 2025 is on thursday, march 20, 2025, at 5:01 a.m. In a few weeks, most americans will lose an hour of sleep as clocks will shift ahead by one hour.

The first day of spring 2025 is at the spring equinox or vernal equinox, the date of equal day and night. The first day of spring is at the vernal equinox, when day and night are equal.