Psalms 81:3

the trumpet Heb. shôphâr, the horn, as distinguished from the metal trumpet. In the Pentateuch the use of the shôphâris only prescribed in connexion with the year of Jubilee (Leviticus 25:9), but according to practice it was used for the New Year as well.

in the new moon The Targum expressly states that the new moon of Tisri is meant here, and there is no sufficient reason for setting aside this ancient Jewish tradition and supposing that the new moon of Nisan, the first month of the ecclesiastical year, is meant, on the ground that the contents of the Psalm shew that the festival at the full moon referred to in the next line must be the Passover.

in the time appointed&c. Better, at the full moon, for the day of our feast. If the month referred to is Tisri, our feastmust be the Feast of Tabernacles, which began at the full moon on the 15th of that month. It was often called simply "the feast" (1 Kings 8:2, &c.), and was regarded as the most joyous of all the feasts. The trumpet blowing at the beginning of the month is regarded as pointing forward to it, and it was repeated on the day itself, in accordance with the law of Numbers 10:10.