Marilyn or John,While I understand the beginning of the Hebrew Year and new calendar year occurs in the (seventh) month of Tishri, Nisan is the FIRST month:Exodus 12:2 This month [shall be] unto you the beginning of months: it [shall be] the first month of the year to you.This passage goes on to describe the Passover, which follows just after the spring equinox.Esther 3:7 In the first month, that [is], the month Nisan.. .How is it that the flood started in October if Genesis says that it started in the SECOND month (just after Nisan) Iyyar on the 17th? The account of the flood is well before the institution of the 7th month (head of the year) holy days. The beginning of months (Nisan) occurring on or just after the spring equinox predated Noah. I'm curious as to how the beginning of the flood occuring in Heshvan can be reckoned Biblically.YBIC,Kevin H.