Hi! Please excuse me for being the "a stranger was wrong on the internet >:(" guy, but the precession of the equinoxes is an incredibly cool concept that I've been learning a lot about lately, and it's not quite what you're describing, but rather the slow rotation of the earth's axis over a period of about 26,000 years: https://en.wikipedia.org/wiki/Axial_precession

Just thought I'd share because astronomy is cool!