And it came to pass, on the twentieth [day] of the second month, in the second year,.... Which was the twentieth of the month Ijar, in the second year of the coming of the Israelites out of Egypt; who, as it appears from hence, compared with Ex 19:1; had been in the wilderness of Sinai twelve months wanting ten days; so Jarchi and other Jewish writers , with whom Aben Ezra agrees, who says it was near a year:that the cloud was taken up from off the tabernacle of the testimony; that part of the tabernacle where the ark of the testimony stood, even the most holy place, over which the cloud was, the token of the divine Presence, and which it covered; but now was taken up from it, and went up higher above it, and was a signal for the motion of the camps of Israel to set forward in their journey towards Canaan's land.
Seder Olam Rabba, c. 8. p. 23.