Summer 2023 ended on different dates depending on the way the seasons are measured:
- By the meteorological definition (based on calendar months), summer ended on Thursday, August 31, 2023.
- By the astronomical definition (based on the summer solstice and autumn equinox), summer ended on Friday, September 22, 2023, with autumn starting on Saturday, September 23, 2023.
Thus, meteorological summer 2023 ended August 31, while astronomical summer 2023 ended September 22.
