When does spring happen?

Answer 1

spring happens when the earth is facing the sun or facing the night because the earth orbits on a axis and can tilt so that we have seasons and day and night also spring can be cold or warm for the record I'm nine years

Answer 2

Geographically, wherever it turns spring on earth, it is also the "springtime" of the animals residing in that region. So therefore it's different across the globe.