1. Hunter Valley Gardens Christmas Lights Spectacular, until 26/1/16
2. Darling Harbour Santa Fest, until 24/12
3. Choirs in the City, every Thursday until 24/12 on Pitt St Mall and every night from 1-24/12 at Martin Place
4. Merry Music Mix in Darling Harbour, every Friday and Saturday until 24/12 or Twilight Xmas Cinema at Central Park, 3-4/12
5. The Grounds of Alexandria Christmas Fayre and Alexandria Village Concert, 5/12
6. Variety Santa Fun Run and Surry Hills Village Concert, 6/12
7. Boulevard of Light, Pitt St Mall, until 25/12
8. Anna Polyviou Giant Gingerbread House at the Shangri La, 2-24/12
9. Carols by the Sea on Bondi Beach or Red Christmas Ball at Doltone House Hyde Park, 9/12
10. Christmas Shopping Night at The Star, 10/12
11. The Rocks Village Bizarre, every Friday until 18/12
12. Inner West Ben & Jerry’s Open Air Cinema: Love Actually, 12/12
13. Kensington Street Christmas Bazaar or The Magic of Christmas concert in Chatswood, 13/12
14. Smooth FM Santa’s Magical Kingdom, 12-24/12
15. Christmas Carols at Sydney Town Hall, 15/12
16. Christmas in the Hills (markets, carols & fireworks), 16/12
17. Paddington Christmas Night Market or Christmas Fare, Hyde Park Barracks Museum
    , 17/12
18. Santa Fest Open Air Cinema, Darling Harbour, every Friday and Saturday until 19/12, plus 24/12
19. Carols in the Domain, 19/12
20. Baby Proms: Jingle Bell Jazz until 20/12 or The Grounds of Alexandria Winter Wonderland, 20/12
21. Christmas Light Projections: Martin Place, St Mary’s Cathedral and Town Hall, until 25/12
22. Moonlight Open Air Cinema: Love the Coopers, 22/12
23. Carriageworks Twilight Christmas Market, 23/12
24. Festive Fireworks, Darling Harbour, every Saturday until 19/12 and 24/12
25. Christmas Day, 25/12
26. Boxing Day Sales and Rolex Sydney To Hobart Yacht Race, 26/12
27. QVB Swarovski Christmas Tree, QVB, until 2/1
28. Festive High Tea at Radisson Blu, until 3/1
29. Santa Spectacular, Rosehill, 8-30/12
30. Check out the best Xmas light displays here, until approximately 5/1/16
31. New Years’s Eve, 31/12

You can find more non-Xmas related events happening in December this month in Sydney here.