6 observances land on 9 October. We have not found a recorded founder for 3 of them.
| Observance | Declared by | First year | Source |
|---|---|---|---|
| Hangul Day South KoreaWikipedia says the date marks the 1446 publication of the text that introduced the Korean alphabet, and that the exact day is only a guess | the Korean Language Society | 1926 | Wikipedia |
| Leif Erikson Day United States, Iceland and NorwayWikipedia says House Joint Resolution 26 was introduced by Congressman Harry Sauthoff of Wisconsin | the United States Congress | 1935 | Wikipedia |
| National Nanotechnology Day United States | no record | — | — |
| Takayama Autumn Festival Takayama, Japan | no record | — | — |
| World Post Day worldwideWikipedia says it was declared at the UPU Congress in Tokyo on a proposal by Anand Mohan Narula of the Indian delegation | the Universal Postal Union | 1969 | Wikipedia |
| Indian Foreign Service Day | no record | — | — |
"No record" means we could not find one, not that none exists. Where a founder is named, the source is named with it.
Who decides these? Nobody official. A brand, a trade body, a government, or one person with a website. Most are simply asserted and then repeated until they look official. Here, whoever names it first.
Nobody has ever named 9 October here. The next one is Saturday, 9 October 2027.
Saturday, 9 October 2027 has no name yet. It costs $2.