So it is 2.40am here in Sydney and I am in bed about to go to sleep. All is quiet and well - the local fireworks weren't too bad (i.e. they didn't go on very long, maybe 30 seconds?) and the horses were fairly quiet in their stables. They basically stood stock still trembling and jumping a little bit at the bigger bangs. They are now chilling out in their stables like normal.
So happy new year everyone!!
What a relief.