Matthew 24:29
"But immediately after the terrible trouble of those days, [i.e., the next major event on God's calendar], the sun will become dark, and [therefore] the moon will not [be able to] shed its [reflected] light. The stars will fall from the sky and the forces of the heavens will be shaken [Note: From the description of these same events in Luke 21:25-26, it is possible that this is figurative language for great calamities happening on the earth].
Mark 13:24
"But after those days of terrible trouble [i.e., the next major event on God's calendar will be], the sun will become dark, and [therefore] the moon will not [be able to] shed its [reflected] light,
Revelation 6:12-13
Then I looked as the Lamb broke open the sixth seal, and there [I saw] a great earthquake; the sun turned as black as sackcloth made out of [goat] hair, and the entire moon turned [as red] as blood.
Revelation 8:12
[When] the fourth angel sounded its trumpet [I saw] one third of the sun, one third of the moon, and one third of the stars being struck, so that one third [of their light] would become darkened. So, the daytime had [only] one third of its [normal] light, and the nighttime was the same way.