This video’s a little New-Agey, but the hymn is a beautiful one for the end of the day. I sing it with my children every night, though not that angelically, and not in a round.
All praise to thee, my God, this night,
For all the blessings of the light.
Keep me, O keep me, King of Kings,
Beneath Thine own almighty wings.
‘Night, all.