You can perhaps make a work-around solution. By fizzling with the black mask function. But I don't think its possible to do with the standard mechanics.
The game picks every unit owned by Player 1 and "Set the time of day to 23.00", "Turn the day/night cycle on" and "Set time of day speed to 80.00% of the default speed" for ALL players the amount of times in ALL units picked.
Which mean, if player 1 has 40 units it will do the loop action 40 times for all players.
You can't turn on/off day and night for a specific player using that function.
I'm on a page about incorrect corrections, and spent the better part of like two hours trying to get someone to understand that -5^2 = -25, not 25, and then that post had comments get reposted because that group is self sustaining, and that person was in turn trying to explain what I just explained to them. And I'm taking that as a victory
I will be AFK for a couple of days you guys hold down the fort while I am gone. I will be checking in on my phone but that will severly limit me. Be back saturday!