I think you may need a more direct explanation, as I don't think "April Fool's Day" is necessarily known in all cultures.

On Tue, Jul 5, 2022 at 8:51 AM Paul Eggert via tz <tz@iana.org> wrote:

On 7/4/22 14:26, Jeff Epler via tz wrote:
> Maybe everyone was in on the joke, but I very nearly wasn't.

I installed the attached to make it less likely for future readers to be
fooled. I hope you don't mind leaving the joke in, as laughter is all
too rare in this project.