Summer in the year 2020 ended on September 22 according to the astronomical calendar, which is based on the September equinox. Meteorologically, summer always ends on August 31. To summarize:
- Astronomical summer in 2020 ended on September 22.
- Meteorological summer in 2020 ended on August 31.
The difference arises because astronomical summer is marked by celestial events (equinoxes and solstices), while meteorological summer aligns with fixed calendar months.
