Because the Earth takes roughly 365.24 days to orbit the sun, these dates shift slightly every year, which is why we have leap years to keep the calendar aligned. 2. Meteorological Seasons (The Weather Calendar)
Usually September 22 or 23 . Like the spring equinox, day and night are roughly equal as the sun crosses back over the equator. when do seasons start
This marks the moment the sun crosses the celestial equator. Day and night are almost equal in length. Because the Earth takes roughly 365
As we go about our daily lives, it's easy to get caught up in the hustle and bustle and lose track of the changing seasons. But have you ever stopped to think about when exactly each season starts? In this post, we'll break down the dates for the beginning of each season in the Northern and Southern Hemispheres. Like the spring equinox, day and night are
Menzel, A., & Fabian, P. (1999). "Growing season extended in Europe." Nature , 397(6721), 659.
Usually June 20 or 21 . This is the longest day of the year, when the North Pole is tilted most directly toward the sun.
This system makes it much easier to calculate seasonal statistics and aligns better with how we actually experience the weather. March 1 – May 31 Summer: June 1 – August 31 Autumn: September 1 – November 30 Winter: December 1 – February 28 (or 29)