7 observances land on 15 May. We have not found a recorded founder for any of them.
| Observance | Declared by | First year | Source |
|---|---|---|---|
| Aoi Matsuri Kyoto | no record | — | — |
| Constituent Assembly Day Lithuania | no record | — | — |
| International Conscientious Objectors Day | no record | — | — |
| International Day of Families International | no record | — | — |
| Mother's Day Paraguay | no record | — | — |
| Nakba Day Palestinian communities | no record | — | — |
| Teachers' Day Colombia, Mexico, and South Korea | 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 15 May here. The next one is Saturday, 15 May 2027.
Saturday, 15 May 2027 has no name yet. It costs $2.