When Is The First Day Of Spring For 2025. The first day of spring is in 2025 on march 20 (according to the astronomical definition). The seasons are defined as spring (march, april, may), summer (june, july, august), autumn (september,.
The spring period spans the following 4 months: The table below will allow you to view the spring start and end dates for the years 2024, 2025 and 2026.