(I am not currently subscribed, please keep me CCed) Hi all, I'm interested in some specific timezone history. Specifically I'm curious about the origin of 'STDOFF 0:19:32.13'. Does anyone have an authoritative source for where this is derived from? Below is what I found so far: 1. In "NEWS" there is this entry: === zic now accepts subsecond precision in expressions like 00:19:32.13, which is approximately the legal time of the Netherlands from 1835 to 1937... === 2. Wikipedia here https://en.wikipedia.org/wiki/UTC%2B00:20 says === The reason for the specific offset of +0h 19m 32.13s was that the time zone was centered on the mean solar time of the Westertoren (4° 53' 01.95" E Longitude), the tower of the Westerkerk church in Amsterdam. === but I can't find any reference to this specific offset in any of the sources listed on Wikipedia. It is possible I missed the reference though. https://articles.adsabs.harvard.edu/pdf/1909Obs....32..297. https://books.google.com/books?id=MbA-AQAAIAAJ&pg=PA75&printsec=frontcover&n... 3. I've seen several references that cite *to* wikipedia or tzdata, but I haven't been able to find anything older. (if this is off topic for the mailing list I apologize, this is the best place I could find) -- Eitan Adler