School finishes a week before Christmas for the summer break and resumes after Australia Day on 26 January. Houses aren't as heavily decorated with greenery as happens in parts of the US, perhaps because, being summer, you can spend time in the outdoors. Some people put Christmas wreaths on their front doors. In some areas there is a long tradition of every house in the street having Christmas lights, and people come to see the decorations. Christmas bush is illustrated in close up and on the tree on this link .
Australian trees have wooden decorations, and glass ones, and tinsel and garlands etc.
Threaded cranberries or popcorn aren't seen much, but everyone has the wobbly beautiful decorations their kids have made. David Jones' department store in Sydney has a staff choir whose fine music fills the ground floor with an eager audience for a half hour each morning throughout December. There are many productions of Handel's Messiah from amateur and professional groups around Australia. Radio Community Chest, a charity providing support to the needy of Sydney, has presented Messiah at Christmas time in the Sydney Town Hall for over 50 years with a choir of over 500 voices drawn from church choirs throughout Sydney. Australian Christmas music includes The Carol of the Birds , The North Wind , Six White Boomers , Santa never made it into Darwin and other music.