10. Also in the day of your gladness, and in your solemn days—Festive and thanksgiving occasions were to be ushered in with the trumpets, as all feasts afterwards were (Ps 81:3; 2Ch 29:27) to intimate the joyous and delighted feelings with which they engaged in the service of God.

     11-15. And in the beginnings of your months ye shall offer a burnt offering unto the Lord—These were held as sacred festivals; and though not possessing the character of solemn feasts, they were distinguished by the blowing of trumpets over the sacrifices (Nu 10:10), by the suspension of all labor except the domestic occupations of women (Am 8:5), by the celebration of public worship (2Ki 4:23), and by social or family feasts (1Sa 20:5). These observations are not prescribed in the law though they obtained in the practice of a later time. The beginning of the month was known, not by astronomical calculations, but, according to Jewish writers, by the testimony of messengers appointed to watch the first visible appearance of the new moon; and then the fact was announced through the whole country by signal-fires kindled on the mountain tops. The new-moon festivals having been common among the heathen, it is probable that an important design of their institution in Israel was to give the minds of that people a better direction; and assuming this to have been one of the objects contemplated, it will account for one of the kids being offered unto the Lord (Nu 28:15), not unto the moon, as the Egyptians and Syrians did. The Sabbath and the new moon are frequently mentioned together.