Exodus 40:17

And it was in the first month in the second year, on the first of the month, the tabernacle was reared up.

Numbers 7:1

And it happened on the day that Moses had fully set up the tabernacle, and had anointed it and sanctified it, and all the vessels of it, both the altar and all its vessels, and had anointed them and sanctified them,

Exodus 40:1-2

And Jehovah spoke to Moses, saying,

Numbers 9:1

And Jehovah 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
And Jehovah spoke to Moses, saying,
Numbers 7:1
And it happened on the day that Moses had fully set up the tabernacle, and had anointed it and sanctified it, and all the vessels of it, both the altar and all its vessels, and had anointed them and sanctified them,
Numbers 9:1
And Jehovah 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,