Exodus 40:17

Now it happened on the first day of the first month (Abib) in the second year [after the exodus from Egypt], that the tabernacle was erected.

Numbers 7:1

On the day that Moses had finished setting up the tabernacle and had anointed and consecrated it and all its furniture, and the altar and all its utensils; he also anointed them and consecrated them [for holy use].

Exodus 40:1-2

Then the Lord spoke to Moses, saying,

Numbers 9:1

The Lord spoke to Moses in the Wilderness of Sinai in the first month of the second year after they had come out of the land of Egypt, saying,

Treasury of Scripture Knowledge

Summary

And it came to pass in the first month in the second year, on the first day of the month, that the tabernacle was reared up.

Bible References

The first month

Exodus 40:1
Then the Lord spoke to Moses, saying,
Numbers 7:1
On the day that Moses had finished setting up the tabernacle and had anointed and consecrated it and all its furniture, and the altar and all its utensils; he also anointed them and consecrated them [for holy use].
Numbers 9:1
The Lord spoke to Moses in the Wilderness of Sinai in the first month of the second year after they had come out of the land of Egypt, saying,