Thanks for letting us know. This means TZDB will need to change for the spring-forward transitions in 2024 and 2025. We might as well adjust predictions for later years to match, though of course this is just guesswork. I installed the attached proposed patch to TZDB to do all that. We hope to have a new TZDB release soon. Given the short notice, likely many cell phones and computers will not be updated in time. It might help if you spread the word that people whose devices are not yet updated can work around the problem by manually setting their devices' time zones to Cairo time on April 13, and manually setting them back to Palestine time on April 20. This sort of hassle can be avoided in the future by giving longer notice of rule changes.