Hello, about Italian time, I see: # From Paul Eggert (2006-03-22): # For Italian DST we have three sources: Shanks & Pottenger, Whitman, and # F. Pollastri # Day-light Saving Time in Italy (2006-02-03) # http://toi.iriti.cnr.it/uk/ienitlt.html # ('FP' below), taken from an Italian National Electrotechnical Institute # publication. When the three sources disagree, guess who's right, as follows: I don't know about the other sources, but: - the url given to cnr.it is dead. - The authoritative source for time in Italy is the national metrological institute, which has a summary page of historical DST data at http://www.inrim.it/res/tf/ora_legale_i.shtml - Some of the data in TZ does not agree with this page. I think that there must be VERY strong evidence that the INRIM is wrong before preferring other sources? Cheers