Born on October 9
World Post Day
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Next: October 9, 2027
Where it comes from
On 9 October 1874, delegates from 22 countries signed the Treaty of Bern in the Swiss capital, creating the General Postal Union and, for the first time, a single postal territory in which letters crossed borders under shared rules. Renamed the Universal Postal Union in 1878, it became a UN specialised agency in 1948.
How it's celebrated
More than 150 countries mark the day. Posts launch new stamps and services, open post offices, mail centres and postal museums to visitors, and thank their staff for good service. Countries taking part in the UPU's letter-writing competition for young people often honour their national winners on 9 October.
Did you know
The UPU is the world's second-oldest international organisation and has 192 member countries.
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Star sign
Libra · September 23 – October 22 · Air sign
Fair-minded and charming, forever weighing both sides.