The Nativity : Chapter 12-98

The old solar calendar of the Jews had 365.25 days.
The old Jewish calendar had 29.5 × 12 days
I named them the old solar calendar of the Jews and the old Jewish calendar.
After 8 A.D., the Jews adopted the new Julian calendar and the new Jewish calendar.
The very hard puzzle rings were hidden in the Roman calendar indeed.
Caesar Augustus reformed the Roman calendar.
Therefore, in 8 A.D., the Jews deleted thirteen days from the old solar calendar of the Jews.