To visualize the stark difference between the two systems, here is a side-by-side breakdown of the season dates for the Northern Hemisphere.
When Do the Four Seasons Start and End? (2026 Edition) Understanding when the four seasons start and end is more complex than just looking at a calendar. Depending on whether you follow astronomy or meteorology, the dates can differ slightly.
Because the Earth's hemispheres experience opposite climates at any given time, the seasonal calendar is completely flipped south of the equator. March 1 to May 31 Winter: June 1 to August 31 Spring: September 1 to November 30 Summer: December 1 to February 28/29 Astronomical vs. Meteorological: Key Differences
Starts at the Winter Solstice (December 20, 21, or 22) and ends at the Vernal Equinox (March 19, 20, or 21). when do the four seasons start and end
The Arctic and Antarctic effectively experience two extreme seasons: a light, cold summer with 24-hour daylight, and a dark, freezing winter with 24-hour night.
Understanding when the four seasons start and end can be surprisingly complicated, as it depends on whether you are following or astronomical definitions. While the Earth’s tilt is the ultimate reason for the seasons, how we categorize them varies.
The four seasons—spring, summer, autumn, and winter—form a continuous cycle that dictates the rhythm of life on Earth. This annual progression is not merely a change in the weather; it is a profound transformation of the landscape, affecting everything from the migration of birds to the growth of the food we eat. To visualize the stark difference between the two
Because our standard calendar only has 365 days, a surplus of about six hours builds up every year. Our system corrects this discrepancy by adding a leap day (February 29) every four years, which resets the astronomical season start dates back to the beginning of their windows. To help tailor this information, let me know:
The sun crosses the celestial equator moving southward. Again, day and night are roughly equal. It signals the beginning of longer nights and shorter days. Cultural note: This is often called "Harvest" season in agricultural societies.
March 20 or 21. This is when day and night are roughly equal in length. Depending on whether you follow astronomy or meteorology,
Areas near the equator do not experience significant changes in the amount of daylight or temperature throughout the year. Instead of four seasons, these regions typically have just two: the Wet Season (monsoon/rainy) and the Dry Season .
If you're interested, I can also explain the specific dates for the or explain the subtle differences in weather between the two systems. Just let me know!