Earth's northern hemisphere warms up literally for the astronomical start to spring. Here's what to know about the season.

This article originally appeared on USA TODAY: Spring equinox 2025 is here: What to know about the change of seasons An amazing view of the Earth at the spring equinox was taken in 2013 by NOAA's ...

Spring starts on Thursday, March 20, when the vernal equinox marks the start of the astronomical season. While the astronomical start to the season isn’t until later March, you may hear ...

The primary reason for the changing on the seasons is the tilt of Earth's axis.

Why are there two first days of spring? What to know about astronomical, meteorological seasons Astronomical seasons are marked by equinoxes and solstices, which relate to the position of the earth.

Saturday is the first day of meteorological spring, but why is it different from the season on the calendar?

Here’s when the first days of spring are, why there’s a different first day for meteorological and astronomical seasons and when we spring forward.

According to meteorological seasons, or seasons divided by weather scientists according to temperature cycles, the first day of spring is always March 1, and the last is May 31.

Spring equinox 2025 is here: What to know about the change of seasons ...

While both definitions of spring are correct, astronomical spring is considered the official calendar start to the season, and meteorological spring marks the transition from colder to warmer weather.

Astronomical seasons are based on Earth’s position to the sun, according to The Old Farmer’s Almanac.