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

*truly ELi5 answer*

The tilt of the earth causes an effect that makes the sun appear to *move* in the sky through the year and return to the same spot after one orbit of the earth. By counting the number of days it takes for the sun to return to same spot we created a calendar based on that number, which is 365 and a quarter.