Current tzdata contains northamerica:1413: # From Paul Eggert (2014-10-18): # H. David Matthews and Mary Vincent's map # "It's about TIME", _Canadian Geographic_ (September-October 1998) # http://www.canadiangeographic.ca/Magazine/SO98/alacarte.asp # contains detailed boundaries for regions observing nonstandard # time and daylight saving time arrangements in Canada circa 1998. Could update this with the Archive.org URIs below or possibly move it to tz-art.html section "Books, plays and magazines": H. David Matthews and Mary Vincent, earliest working Archive.org URIs: https://web.archive.org/web/20071217083933/http://www.canadiangeographic.ca:... https://web.archive.org/web/19990827055050/https://canadiangeographic.ca/SO9... "It's about TIME", "À la Carte" column, Canadian Geographic Magazine, September/October 1998 issue; original CanGeog URIs: http://www.canadiangeographic.ca/Magazine/SO98/alacarte.asp https://canadiangeographic.ca/SO98/geomap.htm Summarizes Canada's time zone rules, boundaries, deviations, and exceptions with maps. In each pair of URIs for Archive.org and CanGeog original, the 1st URI is for article content within that issue's column context, the 2nd URI is the article content alone. -- Take care. Thanks, Brian Inglis Calgary, Alberta, Canada La perfection est atteinte Perfection is achieved non pas lorsqu'il n'y a plus rien à ajouter not when there is no more to add mais lorsqu'il n'y a plus rien à retirer but when there is no more to cut -- Antoine de Saint-Exupéry