What calendar are you talking about? You know that ours is the Gregorian calendar, started by a Pope, don't you?
The planet is not where it began because the entire solar system is moving further away from the central sun of this galaxy, the Milky way, like all the stars we see are also moving further out.
Have you ever seen those spirals from any galaxy shown by our most advanced telescopes? The spirals keep on moving further out because their central sun keeps on birthing new stars, like our sun gives birth to its own planets.
Starchild
