Genesis 1:14; Leviticus 23:4

14 And God said, Let there be lights in the expanse of the heavens to separate the day from the night. And let them be for isigns and for jseasons,1 and for days and years,

The Passover

pThese are the appointed feasts of the Lord, the tholy convocations, which you shall proclaim at the time appointed for them.