On Mon, 3 Mar 2025 at 16:01, Doug Ewell via tz <tz@iana.org> wrote: > 2. Is there an easy way I could have looked up this information in the tz > files? > > (“Easy” means without exhaustively parsing all the Rule and Zone lines, as > a processor would have to do.) >
Not sure if you count grep as a processor, but you can drill down crudely with: grep -n "^Rule.*max" africa antarctica asia australasia europe northamerica southamerica Currently this yields the 52 lines which define Rules that continue until the max year. This is not *strictly* the same as "current practice", but rather "latest-dated ongoing prediction". (It also doesn't guarantee the Rules are actually used anywhere.) A quick visual scan of the penultimate column shows that all such SAVE values have an absolute value of either 0 or 1:00, apart from the Troll and LH rules as have been mentioned by others as the only exceptions. -- Tim Parenti
