Albert Barnes on 1 Thessalonians 5:1

But of the times and the seasons. Acts 1:7. The reference here is to the coming of the Lord Jesus, and to the events connected with his advent. See the close of 1Thes 4.

Ye have no need that I write unto you. That is, they had received all the information on the particular point to which he refers, which it was necessary they should have. He seems to refer to the suddenness of his coming. It is evident from this, as well as from other parts of this epistle, that this had been, from some cause, a prominent topic which he had dwelt on when he was with them. 1Thes 1:10.