These occur when the sun is directly over the equator, making day and night nearly equal in length.
This method is preferred by scientists because the dates never change, making it much easier to calculate seasonal statistics and compare weather patterns from year to year. 2024–2025 Seasonal Transition Dates change of season dates
The calendar on Marta’s wall had three black X’s through October 14th. That was the day Sam left. She hadn’t moved the marker since. These occur when the sun is directly over