According to Corvette Blogger, who obtained this information from Rick Conti:
www.corvetteblogger.com
That's in about 3 weeks, which if true, suggests that the Z06 Anniversary Edition might have less than 200 made, making it a collectible. Corvette Blogger thinks this suggests July 4/23 as the MY change over, as done in the past. Perhaps (?) a welcome change for those who will be ordering a 2024 and looking for new exterior colours and a frunk with an automatic close feature, plus who-knows-what-other-new-features (TBA).

Deadline for Last Customer-Sold Orders for the 2023 Corvette Z06 is April 5th - Corvette: Sales, News & Lifestyle
Within a recent dealer memo, Chevrolet says that the deadline for submitting customer-sold orders for the 2023 Corvette Z06 will be April 5th.

That's in about 3 weeks, which if true, suggests that the Z06 Anniversary Edition might have less than 200 made, making it a collectible. Corvette Blogger thinks this suggests July 4/23 as the MY change over, as done in the past. Perhaps (?) a welcome change for those who will be ordering a 2024 and looking for new exterior colours and a frunk with an automatic close feature, plus who-knows-what-other-new-features (TBA).