Someone replies that the tz db only tracks diversions after 1970 and goes on..
> However, we should have the correct entry for Berlin, which raises the question: where is the commonly accepted center of Berlin? If the center is in the former Soviet zone, tz's Europe/Berlin should use what is in the proposed Europe/BerlinEast zone. If Berlin's center is in the former west-Berlin zone, Europe/Berlin should change to match what is in the proposed Europe/Berlin zone.
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https://web.archive.org/web/20080203081524/http://article.gmane.org/gmane.comp.time.tz/2063