New Year's Day
(Exo 12:1) And the LORD spake unto Moses and Aaron in the land of Egypt, saying,
(Exo 12:2) This month shall be unto you the beginning of months: it shall be the first month of the year to you.
It is evident that this was the start of Yahweh's new year on month 1. (New Year)
We also know now that the new year must start on the 4th day. (from the creation week)
We also know now that the new year must start on the 4th day. (from the creation week)