3 observances land on 17 May. We have not found a recorded founder for any of them.
| Observance | Declared by | First year | Source |
|---|---|---|---|
| Birthday of the Raja Perlis | no record | — | — |
| Children's Day Norway | no record | — | — |
| World Hypertension 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 17 May here. The next one is Monday, 17 May 2027.
Monday, 17 May 2027 has no name yet. It costs $2.