When Do The Four Seasons Start And End Hot!

Starts at the September Equinox ( September 21–23 ) and ends at the December Solstice ( December 20–23 ).

Differences vs astronomical

Occur in spring and autumn when the sun is directly above the equator, making day and night nearly equal in length. when do the four seasons start and end

, the Northern and Southern Hemispheres experience opposite seasons at the same time. When the Northern Hemisphere tilts toward the Sun, the Southern Hemisphere tilts away.

The astronomical seasons are the ones you learned about in grade school. They are defined by the Earth’s 23.5-degree axial tilt and its 365-day journey around the sun. The season changes occur at specific moments in time—the solstices (longest/shortest days) and equinoxes (equal day and night). Starts at the September Equinox ( September 21–23

This means that while the astronomical start of spring may still be March 20, the phenological (biological) start of spring now occurs earlier. For example, the famous cherry blossoms in Washington, D.C., used to peak in early April; they now often peak in late March. The meteorological calendar (March 1) remains a useful statistical tool, but the lived experience of the seasons is undeniably shifting.

Starts exactly on March 1 ; ends on May 31 . When the Northern Hemisphere tilts toward the Sun,

The Arctic and Antarctic circles experience extreme variations in daylight. They spend months in total darkness ("polar night") and months in continuous daylight ("midnight sun"), effectively compressing their climate into two main seasonal experiences: a long, harsh winter and a short, cool summer.

Astronomical seasons are defined by the Earth’s position relative to the Sun. Their start and end dates vary slightly each year (usually by 1–2 days) due to the leap year cycle.