Note: Dates vary slightly due to leap years. Simpler for climate records: split calendar into 3-month blocks based on temperature cycles.
Here’s a concise guide to , breaking down how different calendar systems define the seasons, their dates, and how they align (or don’t) with astronomical and meteorological seasons. 1. Astronomical Seasons (Solar Calendar) Based on Earth’s position relative to the Sun (equinoxes and solstices). Used in most Western traditional calendars. seasons by calendar
| Season | Northern Hemisphere Months | Southern Hemisphere Months | |--------|----------------------------|----------------------------| | Spring | March, April, May | September, October, November | | Summer | June, July, August | December, January, February | | Autumn | September, October, November | March, April, May | | Winter | December, January, February | June, July, August | Note: Dates vary slightly due to leap years
| Season | Northern Hemisphere | Southern Hemisphere | Astronomical Markers | |--------|--------------------|--------------------|----------------------| | Spring | March equinox (Mar 19–21) to June solstice (Jun 20–22) | September equinox (Sep 22–23) to December solstice (Dec 20–22) | Increasing daylight | | Summer | June solstice to September equinox | December solstice to March equinox | Longest day | | Autumn | September equinox to December solstice | March equinox to June solstice | Decreasing daylight | | Winter | December solstice to March equinox | June solstice to September equinox | Shortest day | | Season | Northern Hemisphere Months | Southern