Numbers 28:11

In the beginnings of your months, which though not reckoned among the solemn feasts, Le 23, yet were celebrated as such, by the sound of trumpets, Numbers 10:10, by extraordinary sacrifices, by abstinence from servile works, Amos 8:5, and by attendance upon the ministry of God's word, 2 Kings 4:23. And God ordained it thus, partly that by giving God the first-fruits of every month they should acknowledge him as the Lord of all their time, and own his providence, by which all times and seasons, and all the fruits and blessings of them, and actions done in them, are ordered; and partly that it might be a type of the future renovation of the world by Christ.