First Day Of Spring 2025 Usa Time. The first day of spring occurs on the spring equinox, which marks the astronomical beginning of spring. In the northern hemisphere spring is the first full season to happen in each year.

The 2024 winter solstice is here, bringing the darkest days of the year. In 2025, the exact time of the start of spring is at 09:01 uct (coordinated universal time).