World Post Day is celebrated each year on 9 October, the anniversary of the establishment of the Universal Postal Union (UPU) in 1874 in the Swiss Capital, Bern. It was declared World Post Day by the UPU Congress held in Tokyo, Japan in 1969. Since then, countries across the world participate annually in the celebrations. The Posts in many countries use the event to introduce or promote new postal products and services.

In conjunction with the 150th anniversary of UPU, Pos Malaysia is releasing an exclusive commemorative stamp set.