Vayakhel/Pikudei (Gathered/Accounts) Exodus 35:1 – 40:38
The first verse in chapter 40 provides us with the date that the Tabernacle was completed — the first day of the first month, or the first of Nissan. Nissan is the month which begins the Biblical count of months and it falls at this time of year. It is also known as the month of the spring (Deuteronomy 16:1). It is not the month of Rosh HaShana