LynNY said: Per the Irises wiki, it was registered in 2022
The iris wiki is apparently in error, Day of Reckoning isn't among the irises registered in 2022. Presumably, it was registered in 2023, but those registrations won't be published until sometime next spring, assuming AIS follows its usual pattern.
Any member can add plants to the database. For irises, it's very easy, just put "Iris" (without the quote marks) in the Common Name box, Iris in the Genus box, Day of Reckoning (in this case) in the Cultivar box, and ignore everything else on that page.
