Thanks for looking into that. It confirms that Bern time was not exactly GMT+0:30, though we still don't know what it was; our current value (derived from one of the Shanks values) is probably wrong by a few seconds. It also confirms my suspicion that the 1894 transition was messy, but it suggests that our 1894 transition date of June 1 is correct for Zurich, as my guess is that Zurich was not one of the recalcitrant cantons (though it'd be nice to confirm this). It'd also be helpful to know what time of day the 1894 transition was; we're currently guessing 00:00. And of course this helps only with the 1894 transition; for the circa-1855 transition we're still at sea. In looking into this I found an old bug report from you that zic.8 disagrees with what's currently in 'europe'; I'll fix this shortly. Sorry about that. http://mm.icann.org/pipermail/tz/2011-August/008722.html