The latest dates of posting for Christmas airmail is listed in post offices and on CTT website. The public are advised to post the mail item as early as possible.
https://www.ctt.gov.mo/MacauPost/Contents/News.aspx?pm=3298&lang=en-us
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All information on this site is based on the official language of the Macao Special Administrative Region. The English version is the translation from the Chinese originals and is provided for reference only. If you find that some of the contents do not have an English version, please refer to the Traditional Chinese or Portuguese versions.