Are you living on a different planet?
What if I told you that I live in a place where the year is 2559? No, I am not schizophrenic, I did not watch too many science fiction movies, and I do not live on another planet.
But I do live in Thailand, and the year is 2559 for the simple reason that they use the Buddhist calendar instead of the Christian one. The Christian (Gregorian) calendar starts with the birth of Jesus, 2016 years ago.
The Buddhist calendar starts with the birth of Buddha, 2559 years ago. Most dates in Thailand are written with the Buddhist year which tends to be very confusing for westerners. The trick is to subtract 543 years and you are right back to 2016.