Psalms 104:19

“He appointed the moon for seasons - Genesis 1:14-18. That is, The moon, as well as the sun, is appointed to divide time; to determine its progress; to indicate the return of festival occasions, or appointed times to be observed in any manner. It is, in fact, the foundation of the division of the year into “months,” and consequently the indication of all that is to be observed in the “months” of the year. But for this, there would be no natural divisions of time except those of day and night, and of the year. How great an advantage it is for the purpose of life, to have time broken up into brief intervals or periods which can be marked and remembered, both in our private life and in history,…”

“For seasons - To distinguish the times, the seasons of divers natural events, as of the ebbing and flowing of waters, and other seasons for sacred and civil affairs, which were commonly regulated by the moon. Psalms 104:20”

“104:19-23 The psalmist rejoices in the order of night and day, marking day four of creation (Gen 1:14-19). This cycle gives all creatures an opportunity to live. 104:19 the moon to mark the seasons: Ancient Israel based its calendar on the cycles of the moon. • the sun knows when to set: This is a poetic description from the perspective of normal observation. The sun goes down at a regular time every evening.”

“Psa 8:3, Psa 136:7-9; Gen 1:14-18; Deu 4:19; Job 31:26-28, Job 38:12; Jer 31:35 Psalms 104:20”