6 observances land on 16 April. We have not found a recorded founder for any of them.
| Observance | Declared by | First year | Source |
|---|---|---|---|
| Birthday of José de Diego Puerto Rico, United States | no record | — | — |
| Birthday of Queen Margrethe II Denmark | no record | — | — |
| Flag Day Jordan | no record | — | — |
| Emancipation Day Washington, D.C., United States | no record | — | — |
| National Healthcare Decisions Day United States | no record | — | — |
| World Voice 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 16 April here. The next one is Friday, 16 April 2027.
Friday, 16 April 2027 has no name yet. It costs $2.