Charles H. Spurgeon on Psalms 104:19

He appointed the moon for seasons. "He made the moon to serve in her season, for a declaration ofttimes, and a sign to the world. From the moon is the sign of feasts, a light that decreases in her perfection. The month is called after her name, increasing wonderfully in her changing, being an instrument of the armies above, shining in the firmament of heaven; the beauty of heaven, the glory of the stars, an ornament giving light in the highest places of the Lord." —Ec 10:7