EDIT: Affects 8.1.25, 8.2.12, and 8.3.0RC3+

Hello All,
1.5.8 (forget the revision) on php 8.2. Woke this morning to white screens in admin and front end.

Code:
[02-Nov-2023 10:05:18 America/New_York] Request URI: /manufactuername-m-1.html, IP address: 11.22.33.44
--> PHP Fatal error: Uncaught IntlException: datefmt_create: invalid locale: U_ILLEGAL_ARGUMENT_ERROR in /home/account/www.website.com/includes/classes/zcDate.php:87
Stack trace:
#0 /home/account/www.website.com/includes/classes/zcDate.php(87): IntlDateFormatter->__construct('C', 3, -1)
#1 /home/account/www.website.com/includes/classes/zcDate.php(39): zcDate->initializeConversionArrays()
#2 /home/account/www.website.com/includes/autoload_func.php(47): zcDate->__construct()
#3 /home/account/www.website.com/includes/application_top.php(237): require('/home/account...')
#4 /home/account/www.website.com/index.php(25): require('/home/account...')
#5 {main}
  thrown in /home/account/www.website.com/includes/classes/zcDate.php on line 87.
Please help.

Thank you,
John