Just out of curiosity, I researched the Hebrew calendar, which is now on year 5700+. It is said to have a start date, 1 year before creation??. And every 231 years they loose 1 day, as compared to our calendar.
There are a few other days error, I don't remember exactly what they were. But considering all, about a 6000 year Earth age; is also evidenced by the Hebrew Calendar.
