4 observances land on 20 September. We have not found a recorded founder for any of them.
| Observance | Declared by | First year | Source |
|---|---|---|---|
| National Gibberish Day United StatesSamuel Johnson's 1755 dictionary blamed the word on an alchemist's jargon | no record | — | Checkiday |
| National Youth Day Thailand | no record | — | — |
| Universal Children's Day Germany | no record | — | — |
| Oil Workers' Day Azerbaijan | 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 20 September here. The next one is Monday, 20 September 2027.
Monday, 20 September 2027 has no name yet. It costs $2.