Spring Definition Season Instant

As the Earth tilts closer to the sun, the ground warms up, thawing frozen soil and melting snow.

This is the moment the sun crosses the celestial equator moving north. On this day, day and night are approximately equal in length everywhere on Earth. spring definition season

Astronomically, spring is defined by the . In the Northern Hemisphere, this usually occurs around March 20 or 21. As the Earth tilts closer to the sun,

This definition of spring starts when the first buds appear on trees, migratory birds return, or insects emerge from dormancy. the ground warms up