Seasons are opposite due to Earth’s tilt. When it’s summer in the north, it’s winter in the south.
In the Northern Hemisphere, these dates typically fall between the 20th and 22nd of March, June, September, and December, respectively. However, because the Earth’s orbit is not a perfect circle and the calendar year is not exactly 365 days, the exact dates shift slightly from year to year.
Understanding the transition of the seasons is more than just a calendar exercise; it’s a connection to the astronomical rhythms of our planet. While we often think of seasons starting on the 1st of a month, the "true" beginning of a season depends on whether you are looking through a meteorological lens or an astronomical one.