In: from Hong Kong

World Post Day is celebrated each year on 9 October, the anniversary of the establishment of the Universal Postal Union (UPU) in 1874 in Bern. In 1969 the day was declared World Post Day by the UPU Congress, which was held in Tokyo in that year.

As far as I know in the Netherlands there haven't been issued stamps to celebrate World Post Day. In my collection I have none, and on the internet I only found one stamp and a postmark on the UPU (which is 'Wereldpostvereniging' in Dutch).
A yearly stamp on the 'Day of the postage stamp' is issued on a later date in October (like this 2014 stamp, on 17 October, or the 2015 stamp on 16 October).

In contrary, other countries pay more attention to World Post Day. I was very happy to receive a postcard from Natalie from Hong Kong. The back side showed these beautiful stamps, cancelled by a suitable postmark:



The stamps came on a beautiful postcard as well, showing a fine watercolour painting by Shen Ping.



Thank you very much, Natalie!