Then God said," Let there be lights in the expanse of the heavens to separate the day from the night, and they shall serve as signs and for seasons, and for days and years."
Gen 1:14
"These are the Lord's appointed feasts, the sacred assemblies you are to proclaim at their appointed times."
Lev 23:2
Now before the feast of the Passover, Jesus, knowing that his hour had come that he would depart out of this world to the Father,
having loved his own who were in the world,
he loved them to the end.
John 13:1
"For as often as you eat this Bread and drink this Cup, you proclaim
the Lord's Death until He comes."
1 Corinthians 11:26
Behold,the Day of the Lord is coming, cruel, with Fury and burning Anger, to make the Land a Desolation; And He will exterminate its Sinners from it. For the Stars of Heaven and their Constellations will not give their Light. The Sun will be darkened when it rises, and the Moon will not give its Light.
Isaiah 13: 9-10