Peace and blessing

Exodus 39:32-40:16
Moses inspected the work and saw that they had done it just as the Lord had commanded. So Moses blessed them.
The Lord said to Moses:"Set up the tabernacle, the Tent of Meeting, on the first day of the first month. Place the ark of the Testimony in it and shield the ark with the curtain. Bring in the table and set out what belongs on it. Then bring in the lampstand and set up its lamps. Place the gold altar of  incense in front of the ark of the Testimony and put the curtain at the entrance to the tabernacle."
When work is finished, God gives Moses his instructions for setting up and arranging the Tent, and for its consecration. Aaron and his sons are anointed for service.
Why?
Moses is a leader so he blessed his people worked for the Lord is good and necessary behavior.
The first day of the first month is an important day to Israel.
How?
God's work is in order and has the consequence of peace and blessing.