What Calendar Was Used In Biblical Times. The calendar is one of the oldest. The calendar was primarily lunar, with months beginning at the sighting of the.

However, the length of the months changed due to the slowing of the earth’s rotation, which resulted in the lunar calendar and. The apocryphal books of enoch and of jubilees, dating from maccabean times in the second century before christ, mention a solar year of 364 days containing exactly 52.