When Do Seasons Start

This marks the moment the sun crosses the celestial equator. Day and night are almost equal in length.

If you are looking for a quick reference for the : Autumn 2024: September 22 Winter 2024: December 21 Spring 2025: March 20 Summer 2025: June 20 when do seasons start

Spring begins in September, Summer in December. Why do the dates change? This marks the moment the sun crosses the celestial equator

Here’s a useful and well-cited paper that directly addresses the question of when seasons start, including both astronomical and meteorological definitions, as well as phenological and climatic perspectives: including both astronomical and meteorological definitions

Why? It makes calculating seasonal weather statistics and forecasts much easier!