7 observances land on 1 April. We have not found a recorded founder for any of them.
| Observance | Declared by | First year | Source |
|---|---|---|---|
| April Fools' Day | no record | — | — |
| Odisha Day Odisha, India | no record | — | — |
| Arbor Day Tanzania | no record | — | — |
| Civil Service Day Thailand | no record | — | — |
| Edible Book Day | no record | — | — |
| Fossil Fools Day | no record | — | — |
| Kha b-Nisan, the Assyrian New Year Assyrian people | 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 1 April here. The next one is Thursday, 1 April 2027.
Thursday, 1 April 2027 has no name yet. It costs $2.