One reason a wise father gives his children a curfew is because of the increase of evil done at night. As the apostle Paul observed, “those who get drunk are drunk at night” (1 Thessalonians 5:7). Thieves prefer doing their work in the night (cf. 1 Thessalonians 5:2). Evildoers have fewer pangs of conscience and less fear of discovery under the cloak of darkness.
The folly of this is crystal clear in Psalm 139:11-12. Here, it is written, “If I say, ‘Surely the darkness shall fall on me,’ even the night shall be light about me; indeed, the darkness shall not hide from You, but the night shines as the day; the darkness and the light are both alike to You.”
Truly, “there is no creature hidden from His sight, but all things are naked and open to the eyes of Him to whom we must give account” (Hebrews 4:13).