 They are at a special time, and he's going to date them, or tell you by counting a certain number of days when the feast should take place. Verse 5, in the 14th day of the first month, that month in our calendar would be basically the month of April. In the 14th day of the month of April, or in the 14th day of Nisan, which is the Jewish month, in the 14th day of the first month, at even time,