The Hillelic Pharisees, starting with Gamaliel I, using the “traditions of their fathers” and heavily influenced by Babylonian customs, instituted a series of modifications that forever changed the requirements for determining the beginning of a month and a year in what became known as Orthodox Judaism.

One must realize the fact that there is no record before the Mishnah (200 C.E.)—and then only when it deals with the period of Pharisaic control over intercalation beginning in 41 C.E.—of any official sanctification of the new moons and the requirement for witnesses before a court to confirm a visual sighting of a new moon crescent.