Night
Night is more than just the time period that begins at sundown and ends at sunrise. Unlike the day, night is typified by darkness and filled with unseen obstacles and dangers. The night offers cover for sinful people to undertake selfish pursuits, and it provides challenges for the believer when we sense the "night" in our society. The Lord Jesus will return like "a thief in the night" (1 Thessalonians 5:2) - when we least expect him and whether we're ready or not.

There are many great stories in the Bible that occurred during the night: During the night of Passover, the Lord struck down every firstborn son of the Egyptians. The Israelites followed a pillar of fire when they traveled by night during the exodus. Under cover of night, Gideon and an army of Midianites. Torches lit the night when Jesus was betrayed in the Garden of Gethsemane.

God creates the night, and he separates it from the day.
Genesis 1:5, 14, 16, 18
Jesus will return as a thief in the night, and believers should be prepared.
Matthew 24:42-44
Luke 12:38-40
In heaven there will be no night.
Revelation 21:25; 22:5