ELi5: If seasons are due to the tilt of the earth and not the orbit around the sun, how do they occur on roughly the same days every year?

Question

Is it just coincidence that the 4 season begin and end at same point in the orbit around the sun?

In: Physics

Answer 1

Seasons are due to the tilt of the earth **and** the rotation around the sun.

The earth always tilts in the same direction (at least over the short term). In December the north pole tilts towards the sun, and in June, it tilts away. The direction of the title doesn’t change, only the earth’s position around the sun.