New Year...

On New Years Eve we stay up until midnight to ring in the new year. My kids are determined to stay up until midnight. Now the question is should I let them? I know that if they stay up super late even if they sleep in they are still ornery and annoying the next day. I have had a hard enough time with them the past couple of days since they have come back from being with their mom for a week. They have no rules over there and are usually covered head to toe in bruises and scratches from their cousins. When I ask them to do something it usually requires me to ask 3 times and then yell at the top of my lungs which startles them and then I feel bad. But they could be staring at a spot on the wall and I can ask nicely until the cows come home and it would never be heard. Kinda makes me wonder why type of communication goes on over there.