Brazil is not the only country with an official time zone web site. The German time zone web site by the Physikalisch-Technische Bundesanstalt contains DST information back to 1916. http://www.ptb.de/english/org/4/43/432/sumo.htm http://www.ptb.de/english/org/4/43/432/sumn.htm http://www.ptb.de/english/org/4/43/432/lega.htm Markus -- Markus G. Kuhn, Security Group, Computer Lab, Cambridge University, UK email: mkuhn at acm.org, home page: <http://www.cl.cam.ac.uk/~mgk25/>