In 2024, the official first day of spring is March 19 on the day of the vernal equinox.
Astronomically speaking the first day of spring is marked by the spring equinox which falls on March, 19, 20, 21 every year. It happens at the exact moment worldwide, although all the clocks are different. And, as mentioned above, this date only signals spring’s beginning in the Northern Hemisphere; it announces fall’s arrival in the Southern Hemisphere.
Meteorologically, the official first day of spring is March 1 (and the last is May 31).
Weather scientists divide the year into quarters to make it easier to compare seasonal and monthly statistics from one year to the next.
The meteorological seasons are based on annual temperature cycles rather than on the position of Earth in relation to the Sun, and they more closely follow the Gregorian calendar.