5 observances land on 15 June. We have not found a recorded founder for any of them.
| Observance | Declared by | First year | Source |
|---|---|---|---|
| Arbor Day Costa Rica | no record | — | — |
| Day of Valdemar and Reunion Day Denmark | no record | — | — |
| Engineer's Day Italy | no record | — | — |
| Global Wind Day international | no record | — | — |
| National Salvation 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 15 June here. The next one is Tuesday, 15 June 2027.
Tuesday, 15 June 2027 has no name yet. It costs $2.