World Post Day
The postal service connected the world before the internet — and still does.
About
World Post Day on October 9 marks the anniversary of the establishment of the Universal Postal Union (UPU) in Bern, Switzerland in 1874 — one of the oldest international organisations still in operation. The UPU connects 192 member countries through the global postal network, handling over 330 billion letters and parcels annually. The day celebrates the role of the postal sector in everyday life and how it contributes to global communication and commerce.
History
The UPU was established on October 9, 1874, when 22 countries signed the Treaty of Bern, creating the first global postal service. World Post Day was proclaimed at the 1969 UPU Congress in Tokyo. In 1874, a letter from Europe to Asia might take months. Today the postal system's integration with e-commerce and last-mile delivery makes it more essential than ever.
Where It's Observed
Cultural Context
US United States
The United States Postal Service delivers to every address in America — over 160 million delivery points — making it the largest postal network in the world. World Post Day highlights the USPS's crucial role in rural connectivity and the ongoing policy debates about its funding and future.
KR South Korea
Korea Post has modernised rapidly, integrating e-commerce logistics with traditional mail services. The distinctive bright-orange postal workers are ubiquitous on Korean streets. World Post Day highlights the transition from traditional letter writing to package delivery in a digitised economy.
JP Japan
Japan Post is one of the world's most trusted and efficient postal systems, famed for its punctuality and the unique furusato nozei (hometown tax return gift) package system. World Post Day celebrates Japan Post's role in binding together a geographically scattered island nation.
How to Participate
- 01Send a handwritten letter or postcard to someone — reclaim the art of correspondence
- 02Learn about your country's postal history and its role in national development
- 03Thank your mail carrier or postal worker for their daily service
- 04Exchange postcard addresses with someone in another country through a postcard exchange community
Frequently asked questions
When is World Post Day?+
World Post Day is observed annually on October 9. The date is fixed each year — October 9 — and does not shift based on the lunar calendar or weekday.
What is World Post Day?+
World Post Day on October 9 marks the anniversary of the establishment of the Universal Postal Union (UPU) in Bern, Switzerland in 1874 — one of the oldest international organisations still in operation. The UPU connects 192 member countries through the global postal network, handling over 330 billi…
Is World Post Day a public holiday?+
World Post Day is an international observance or awareness day, not a public holiday in most countries. It does not typically result in days off work or school closures, though some countries and organisations hold official events.
How can I participate in World Post Day?+
Send a handwritten letter or postcard to someone — reclaim the art of correspondence Learn about your country's postal history and its role in national development Thank your mail carrier or postal worker for their daily service These are some of the most accessible ways to engage with the day's purpose.
Which countries observe World Post Day?+
Global — Universal Postal Union initiative, 192 member countries.
Mark the date
Download a free printable calendar for 2026 and never miss World Post Day.