According to these videos below, the 1st day of the 1st month of every year or Nisan 1 or Abib 1 on Enoch's calendar always began on the 1st day following the Spring Equinox. The first new moon after the Spring Equinox had nothing to do with Enoch's calendar. So every feast fell on the same day every year. Pentecost or the Feast of Weeks always fell on the 15th day of the 3rd month called Sivan on 6/03, and the Feast of New Wine always fell on the 3rd day of the 5th month called Av on July 22. Below is Enoch's 364 day calendar & Biblical events from 2018-2029: