Autumn, also known as fall, is the season of harvest and change. In the Northern Hemisphere:
Summer begins when the Sun reaches its highest point in the sky, resulting in the longest day of the year. when do the four seasons start and end
Definition
The start and end dates of the four seasons depend on whether you use the or meteorological calendar. Astronomically, seasons are marked by the Earth's position relative to the sun (solstices and equinoxes), while meteorologists use fixed three-month blocks based on temperature cycles. Seasonal Dates for 2026 Meteorological Dates Astronomical Dates (Northern Hemisphere) Spring March 1 – May 31 March 20 – June 20 Summer June 1 – August 31 June 21 – September 22 Autumn September 1 – November 30 September 23 – December 20 Winter December 1 – February 28 December 21 – March 19 (2027) Autumn, also known as fall, is the season