I don't recall Melbourne ever decorating a tram for Christmas.
This tram in Milan is decorated but I think somewhat spoilt by the commercialism. Apparently the tram is only decorated if a sponsor can be found. It looks like a giant can of you know what. Time .27
Not so commercial in Budapest. I have showed you the Budapest Christmas tram before, but here it is briefly, travelling along the banks of The Danube on the famous Route 2 on the Pest side of the river. I was a bit excited to remember the very tram stop and seeing the White Bridge and then after the tram departs, the Chain Bridge, Fisherman's Bastion and Buda Castle. Time 1.12 There is a longer and better look at the Budapest tram here.