The latest dates of posting for airmail(letters, cards, packets and parcels) intended for delivery before Christmas Day are shown below. While the dates are provisional, they are worked out based on the requirements of overseas postal administrations. These dates are subject to availability of flight services and may be altered at short notice. The public are advised to post earlier than the dates shown.(http://www.hongkongpost.com/eng/publications/notices/2011/20111109a/index.htm)
Hongkong Post announced today (November 24) that the last date for posting Christmas mail for local delivery before Christmas Day will be December 22 (Thursday). Postings after this date might run the risk of not being delivered in time because of the anticipated seasonal work pressure. Members of the public are advised to post mail as early as possible in order to avoid a last-minute rush.(http://www.hongkongpost.com/eng/publications/news/2011/20111124a/index.htm)