The - 4 Seasons Dates

The distinction between the two systems is crucial for different fields of study.

While meteorological dates are fixed to the first of the month for easy data tracking, astronomical dates shift slightly each year due to the elliptical shape of Earth's orbit and the leap year cycle. Meteorological Dates Astronomical 2026 Astronomical 2027 March 1 – May 31 Summer June 1 – August 31 Autumn Sept 1 – Nov 30 Winter Dec 1 – Feb 28/29 Astronomical vs. Meteorological Seasons