What Is The 1st Day Of Spring 2025 Calendar. Here are the equinox and solstice dates—plus, answers to common questions about the seasons of the year in north america. The first day of spring is in 2025 on march 20 (according to the astronomical definition).

Spring will start in march, but the beginning of the season will be different based on whether you consider astronomical or meteorological seasons. Spring will last from march 20 until june 21, when summer officially starts in 2025.