Turns out it's the first 25-hour Leap Day of the new millennium (in Eastern Kazakhstan). Happy Leap Day indeed! 
https://typesandtimes.net/2024/02/kazakhstan-25-hour-leap-years

On Thu, Feb 29, 2024 at 9:12 AM Steve Allen via tz <tz@iana.org> wrote:
On Thu 2024-02-29T08:56:54-0500 Arthur David Olson via tz hath writ:
> ...to those who celebrate; Happy March 0 to those who don't.

Alas, I already celebrated Sunday on the bissextus.

--
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