5 observances land on 20 October. We have not found a recorded founder for any of them.
| Observance | Declared by | First year | Source |
|---|---|---|---|
| Arbor Day Czech RepublicWikipedia says the day encourages people to plant trees, and the first documented tree-planting festival was held in Mondoñedo, Spain, in 1594 | no record | — | Wikipedia |
| Heroes' Day Kenya | no record | — | — |
| Vietnamese Women's Day Vietnam | no record | — | — |
| World Osteoporosis Day | no record | — | — |
| World Statistics 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 20 October here. The next one is Wednesday, 20 October 2027.
Wednesday, 20 October 2027 has no name yet. It costs $2.