Season typically refers to one of four periods: spring, summer, autumn (fall), and winter. The exact start dates depend on which definition you’re using:
- Astronomical seasons: defined by the Sun’s position (solstices and equinoxes). In the Northern Hemisphere, spring begins around March 20–21, summer around June 20–21, autumn around September 22–23, and winter around December 21–22. These dates can shift by a day or so each year.
- Meteorological seasons: divide the year into four three-month blocks: spring (March 1–May 31), summer (June 1–August 31), autumn/fall (September 1–November 30), and winter (December 1–February 28/29). This system is widely used for weather forecasting and statistics in many places.
- Local conventions: some regions or organizations use slightly different dates (e.g., UK traditional calendars or regional definitions), but the astronomical and meteorological schemes cover most uses.
If you’re asking about a specific location (e.g., a country or city) or a specific year, I can give exact start dates for that context.
