ליטעראַטור פֿון בית שני אויף בראשית 1:14

It is added, moreover, “and for appointed times” (Gen. 1:14). By “appointed times” Moses understood the four seasons of the year, and surely with good reason. For what idea does “appointed time” convey but “time of achievement”? Now the four seasons of the year bring about achievement by bringing all things to perfection, all sowing and planting of crops, and the birth and growth of animals.

[117] “And in the fourth year,” it says, “all its fruit shall be holy, for giving praise unto the lord” (Lev. 19:24). In many parts of the Lawgiving, but above all in the record of the creation of the universe, we see the prophetic word glorifying the number 4. For (Gen. 1:14) it ascribes to the fourth day the making of those things on which depends the soul’s chiefest good;