Can anyone give me approx NYE start/finish times?

[HA]

i'm trying to coordinate some logistics involving public transport,   divorce litigation and babysitting -- Does anybody know at WHAT TIMES the once in a lifetime new years eve show will probably START and most importantly END?  Any opening acts? Hate to bring up such a mundane thing when everyone is so jazzed up, but i appreciate some help on this, thank you

[Sassbox]

I think the best guesstimates have been 9 - 1.  Good luck with planning!