Genesis 1:14
And God said, Let there be lights in the firmament of the heaven to divide the day from the night; and let them be for signs, and for seasons, and for days, and years:
Torrey's Topical Textbook—AKJV

Psalm 104:19
He appointed the moon for seasons: the sun knows his going down.
Torrey's Topical Textbook—AKJV