Obviously, they can't stay up until midnight and in our sleep-deprived states Kevin and I don't even find that enjoyable. So I chromecasted Australia's fireworks countdown off YouTube and told them it was midnight.
I gave each of us a plate of 12 grapes (like in Cuba and Spain) except Miranda who had two very cut up grapes. And we filled our less fancy champagne flutes with sparkling apple cider. (Yes, despite drinking champagne maybe twice a year, we have two sets of flutes because wedding gifts!)