What’s the difference between meteorological and astronomical seasons?

March 1 marks the beginning of what is called “meteorological spring.”

However, your calendar shows that spring doesn’t officially begin until March 20. What’s the difference?

The “official” beginnings or ends of seasons that you are accustomed to using are called “astronomical seasons.” The astronomical calendar is centered around the Earth’s revolution around the sun.

The Earth’s orbit around the sun, combined with our home planet’s tilt, gives us our seasons.

The astronomical beginning of spring occurs when the sun is directly over the equator and is called the vernal equinox, which occurs in March.