1st Day Of Spring 2025 Usa Calendar. The first day of spring 2025 is on thursday, march 20, 2025, at 5:01 a.m. [1] january 20th is inauguration day.

Holidays in red denotes federal holiday. The first day of spring (march equinox or vernal equinox) is when the sun shines directly on the celestial equator passing from south to north and the length of day and night are almost the.