When Do The Four Seasons: Start And End

When the four seasons start and end depends on whether you follow the stars or the thermometer. There are two primary systems used to define these dates: the astronomical calendar and the meteorological The Old Farmer’s Almanac 1. Astronomical Seasons (Celestial Alignment)

The astronomical seasons are dictated by the Earth's position relative to the Sun, specifically marked by two (when day and night are nearly equal) and two

(the longest and shortest days of the year). Because a full orbit takes approximately 365.24 days, these dates shift slightly each year. in the Northern Hemisphere, the astronomical timeline is: Starts March 20 (Vernal Equinox) and ends June 20. Starts June 21 (Summer Solstice) and ends September 21. Fall (Autumn):

Starts September 22 (Autumnal Equinox) and ends December 20.

Starts December 21 (Winter Solstice) and ends March 19, 2027. The Old Farmer’s Almanac 2. Meteorological Seasons (Temperature Cycles)

Calendar, astronomical and meteorological seasons - MeteoSwiss

The start and end dates for the four seasons depend on whether you use the astronomical (sun-based) or meteorological (temperature-based) calendar. The Old Farmer’s Almanac Northern Hemisphere Dates (2026)

For most people in the Northern Hemisphere, the official "first day" of a season follows the astronomical calendar, though weather experts use fixed monthly dates for better data tracking. Time and Date Astronomical (Sun Position) Meteorological (Calendar) March 20 – June 20 March 1 – May 31 June 21 – Sept 21 June 1 – August 31 Sept 22 – Dec 20 Sept 1 – Nov 30 Dec 21 – March 19 (2027) Dec 1 – Feb 28 (2027) Why Two Different Systems? when do the four seasons start and end

Seasons of the Year: When Do They Start and End? - Time and Date

In the celestial clockwork of our world, the four seasons aren’t just dates on a calendar; they are the rhythmic breathing of the Earth as it tilts toward and away from the sun. The Awakening: Spring

Starts: March 20 or 21 (Vernal Equinox)Ends: June 20 or 21Spring begins at the Equinox, a moment of perfect balance where day and night are equal [1, 2]. It is the Earth’s exhale after a long slumber. This season is a story of resurrection—the sudden greening of the hills, the frantic song of returning birds, and the softening of the soil [3, 4]. It is the brief, fragile window where the world transitions from "surviving" back to "thriving." The Radiance: Summer

Starts: June 20 or 21 (Summer Solstice)Ends: September 22 or 23Summer arrives when the Earth’s tilt toward the sun reaches its maximum, gifting us the longest day of the year [1, 5]. It is the season of abundance and intensity. The story of summer is told in the heavy heat of the afternoon, the drone of cicadas, and the deep, dark greens of full-growth forests [4]. It is a time of outward energy, where life burns at its brightest before the slow cooling begins. The Letting Go: Autumn

Starts: September 22 or 23 (Autumnal Equinox)Ends: December 21 or 22As the sun crosses the equator again, we return to balance, but with a different weight [1, 6]. Autumn is the Earth’s sigh. The story here is one of beautiful surrender. Trees shed what they no longer need, turning their leaves into a final, fiery display of gold and crimson [4, 6]. It is a season of harvest and preparation—a reminder that there is dignity and beauty in endings. The Quiet: Winter

Starts: December 21 or 22 (Winter Solstice)Ends: March 20 or 21Winter begins on the shortest day and the longest night [1, 7]. It is the season of the inward turn. While the surface world seems stark and frozen, the story of winter is actually one of deep, hidden strength. Beneath the frost, life is dreaming and gathering energy [4]. It is a time of silence, starlight, and the necessary rest that makes the coming spring possible.

There are actually two different ways to define the seasons: the Meteorological method (used by scientists and weather forecasters) and the Astronomical method (based on the position of the Earth relative to the sun). When the four seasons start and end depends

Here is the breakdown of both.

🌍 Note: Dates shift by ~1 day depending on the year and time zone. In the Southern Hemisphere, all seasons are opposite to the North.

🌱 Equinox = roughly equal day & night.

Summer begins when the Sun reaches its highest point in the sky, resulting in the longest day of the year.

Definition

  • These dates shift slightly each year because Earth’s orbit isn’t an exact number of days and because of leap years.

    • Why they matter

    Typical dates (Northern Hemisphere)

    Each astronomical season runs from one event to the next:

    Southern Hemisphere: swap spring/summer/fall/winter. For instance, the December solstice is the start of summer there.

    Irregularities and precise timing

    Implications

    The answer depends entirely on your context.

    🔥 Solstice = longest/shortest day of the year.