Aligns with monthly climate data; easier for forecasting and comparing statistics. Cons: Ignores equinoxes/solstices; feels arbitrary to traditionalists.
The vernal equinox, also known as the spring equinox, marks the beginning of spring in the Northern Hemisphere and autumn in the Southern Hemisphere. On this day, the Sun crosses the celestial equator from south to north, and day and night are approximately equal in length. when do the seasons start
In the Northern Hemisphere, the seasons typically start on the following dates: Aligns with monthly climate data; easier for forecasting