The latest dates of posting for Air Parcels intended for delivery before Christmas Day from Hong Kong.
USA - 7.12.12
United Kingdom - 6.12.12
Australia - 10.12.12
Germany - 5.12.12
Japan - 8.12.12
Canada - 4.12.12
Mexico - 8.12.12
Details, please refer to HK Post Notices this year.

Since there is sometimes serious postage delay in the month before Christmas , earlier buy will have more chance to receive the parcels before Christmas.

Happy Christmas and New Year !

I can add a bit to that. There have been some major problems getting packages sent from HK. I've sent puzzles to the Netherlands, Germany, and the UK in late-August, Early September via airmail and they have just been arriving this past week! Good luck with getting your Christmas puzzles out of HK.

katsmom is right!
I'm still waiting for a package from HK. It was sent out at 18 of Aug, and there is sign of it till now.

I hope that there will be major changes, because I really would like to buy some puzzles for Christmas.

another thing to keep in mid as well... customs sometimes love to sit on a package for days to weeks at a time.

My 2 cents: no any problems with parcels from HK to Russia,
all arrived (and arriving) in time.