Thanks for the information. It is good to have predictions for several years in advance, as it can take some time for this information to propagate to cell phones and computers. The attached proposed patch predicts similar transitions after the year 2026, as that seems more likely than no transitions. Although the announcement doesn't say how transition dates are calculated, the dates through 2026 are consistent with Palestine springing forward at 02:00 on the first Saturday on or after March 24, and falling back on the first Saturday on or after October 24. If this is not the intended rule please let us know, since our software is rule-based for predictability. As Tim mentioned, it'd also be good to have a URL referring to a public announcement of the change. In the meantime the attached proposed patch refers to an archived copy of the decision of the Council of Ministers that you emailed to us. It looks like we'll need a new tzdb release in the not-too-distant future, since the current release is wrong for Palestinian timestamps for about one day on October 28.