A sabbath - Here and in Leviticus 23:39 a word which should rather be rendered a sabbatical rest.
Blowing of trumpets - Here and in Numbers 29:1, literally “shouting”. There is no mention of trumpets in the Hebrew text of the Law in connection with the day. However, there is no reason to doubt the tradition that the day was distinguished by a general blowing of trumpets throughout the land, and that the kind of trumpet generally used for the purpose was the curved horn of an animal or a cornet of metal, such as was used at Sinai Exodus 19:16, and on the Day of Jubilee Leviticus 25:9. It must have differed in this respect from the ordinary festival of the New moon when the long straight trumpet of the temple alone was blown (Numbers 10:2; Exodus 25:23; see cut).
Seventh month - Called by the Jews in later times it was called Tisri, but in the Old Testament Ethanim, 1 Kings 8:2. According to the uniform voice of tradition “the first day” of this month was the first day of the Civil year in use before the Exodus, and was observed as the festival of the New year. Some have viewed it as a commemoration of the Creation of the world Job 38:7 : others, as the anniversary of the giving of the Law.