When Do The Four Seasons Start And End May 2026

To complicate matters further, different cultures around the world define seasons in their own unique ways.

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In 2026, the four seasons start and end on different dates depending on whether you use the astronomical (solstices and equinoxes) or meteorological (full months) definition. Northern Hemisphere Seasons (2026) Astronomical Dates Meteorological Dates Spring March 20 – June 20 March 1 – May 31 Summer June 21 – September 22 June 1 – August 31 Autumn September 23 – December 20 September 1 – November 30 Winter December 21 – March 19, 2027 December 1 – February 28, 2027 Southern Hemisphere Seasons (2026) Astronomical Dates Meteorological Dates Autumn March 20 – June 20 March 1 – May 31 Winter June 21 – September 22 June 1 – August 31 Spring September 23 – December 21 September 1 – November 30 Summer December 22 – March 19, 2027 December 1 – February 28, 2027 Key Differences

Astronomical Seasons: Based on Earth's position relative to the Sun. These dates vary slightly each year due to the Earth's elliptical orbit. Tools like the Time and Date Season Calculator can show exact times for your specific location. when do the four seasons start and end

Meteorological Seasons: Used by climatologists for consistent data tracking, these divide the year into four three-month periods. In Australia, for example, the Bureau of Meteorology typically defines seasons starting on the first day of the month. When Do Seasons Start and End? - Time and Date

The timing of the seasons depends on whether you follow the astronomical calendar (based on Earth's position relative to the sun) or the meteorological calendar (based on temperature cycles). 📅 Astronomical Seasons (2026)

These are defined by equinoxes and solstices. They usually fall around the 20th–22nd of the month. Spring: March 20 – June 20 (Spring Equinox) Summer: June 21 – September 21 (Summer Solstice) Autumn: September 22 – December 20 (Fall Equinox) Winter: December 21 – March 19 (Winter Solstice) 🌡️ Meteorological Seasons To complicate matters further, different cultures around the

Meteorologists use full months to simplify record-keeping and align with the annual temperature cycle. Spring: March 1 – May 31 Summer: June 1 – August 31 Autumn: September 1 – November 30 Winter: December 1 – February 28 (or 29) 🌏 Why Do They Happen? The Tilt: Earth is tilted at 23.5 degrees.

The Orbit: Different parts of Earth receive more direct sunlight at different times of the year.

The Hemisphere: Seasons are reversed in the Southern Hemisphere. (e.g., Australia’s Summer starts in December). 🔍 Key Terms to Know Equinox: Day and night are approximately equal length. If you’d like: I can

Solstice: The day with the most (Summer) or least (Winter) daylight.

Lag of Seasons: Why the hottest day isn't until weeks after the solstice (the Earth takes time to warm up).

If you are a gardener, a farmer, a utility company planner, or a public health official, the astronomical seasons are frustrating. Why? Because by the time the winter solstice arrives on December 21, it has already been cold for weeks. Conversely, by the summer solstice on June 21, the hottest weather is often still a month away (due to seasonal lag).

To solve this, meteorologists (and many climatologists) created a simpler, more practical system based on the annual temperature cycle. They split the year into three-month blocks that align with our sensory experience of weather.