Wednesday, 4 Oct 2023 is listed as the day when we select the baseline for the long term support release that will be delivered November 15, 2023.
I propose
Jenkins 2.426 as the next LTS baseline. It removes Prototype.js from Jenkins core and adds the Java 11 end of life administrative monitor to warn users that Jenkins will no longer support Java 11 after September 30, 2024.
I've updated my development environment to run Jenkins 2.426 with JDK 21. I've found no issues in the testing that I've performed.
Mark Waite