| Season | Start Event | Typical Start Date | End Date | |--------|-------------|--------------------|----------| | | Vernal Equinox | March 19–21 | June 20–21 | | Summer | Summer Solstice | June 20–21 | September 22–23 | | Autumn (Fall) | Autumnal Equinox | September 22–23 | December 21–22 | | Winter | Winter Solstice | December 21–22 | March 19–21 |
The North Pole is tilted at its maximum toward the sun. This is the longest day of the year and the height of the solar calendar. Fall (Autumnal Equinox) Starts: September 21, 22, or 23 Ends: December 20, 21, or 22 when the seasons start and end
Earth does not travel in a perfect circle. Because its speed varies depending on how close it is to the sun, the seasons aren't exactly the same length. The Southern Hemisphere Flip | Season | Start Event | Typical Start