2 observances land on 18 November. We have not found a recorded founder for 1 of them.
| Observance | Declared by | First year | Source |
|---|---|---|---|
| National Vichyssoise Day United States | no record | — | National Day Calendar |
| National Princess Day United States | National Day Calendar with Seldon Young | 2017 | National Day Calendar |
"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 18 November here. The next one is Wednesday, 18 November 2026.
Wednesday, 18 November 2026 has no name yet. It costs $2.