In a recent Unearthed Arcana video, Jeremy Crawford at WotC revealed that the new core rulebooks would definitely not be available in May of this year, as reported in the (withdrawn) infographics released by WotC on social media and at last year's Pax Unplugged 2023 panel.
I just want to confirm with you and as well with everyone watching this video - that is definitely not the release date. That was never the release date. In fact, we will still be working on the books in May.