Keluaran 40:17

40:17 So the tabernacle was set up on the first day of the first month, in the second year.

Keluaran 12:2

12:2 “This month is to be your beginning of months; it will be your first month of the year. ¹ 

Bilangan 9:1

Passover Regulations

9:1 ² The Lord spoke to Moses in the wilderness of Sinai, in the first month of the second year after they had come out ³  of the land of Egypt:

[12:2]  ¹ sn B. Jacob (Exodus, 294-95) shows that the intent of the passage was not to make this month in the spring the New Year – that was in the autumn. Rather, when counting months this was supposed to be remembered first, for it was the great festival of freedom from Egypt. He observes how some scholars have unnecessarily tried to date one New Year earlier than the other.

[9:1]  ² sn The chapter has just the two sections, the observance of the Passover (vv. 1-14) and the cloud that led the Israelites in the wilderness (vv. 15-23). It must be remembered that the material in vv. 7-9 is chronologically earlier than vv. 1-6, as the notices in the text will make clear. The two main discussions here are the last major issues to be reiterated before dealing with the commencement of the journey.

[9:1]  ³ tn The temporal clause is formed with the infinitive construct of יָצָא (yatsa’, “to go out; to leave”). This verse indicates that a full year had passed since the exodus and the original Passover; now a second ruling on the Passover is included at the beginning of the second year. This would have occurred immediately after the consecration of the tabernacle, in the month before the census at Sinai.