3 observances land on 9 December. We have not found a recorded founder for any of them.
| Observance | Declared by | First year | Source |
|---|---|---|---|
| Fatherland's Heroes Day Russia | no record | — | — |
| International Anti-Corruption Day United Nations | no record | — | — |
| National Heroes Day, formerly V.C. Bird Day. Antigua and Barbuda | 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 December here. The next one is Wednesday, 9 December 2026.
Wednesday, 9 December 2026 has no name yet. It costs $2.