Here's one possible way to reflect Busingen, Germany following Zurich rather than Berlin in 1980. Another possibility would be to add a... DE +474149+084125 Europe/Busingen ...line to "zone.tab" and a... Link Europe/Zurich Europe/Busingen ...line in "europe" The Link could be avoided by adding a... DE +474149+084125 Europe/Zurich Busingen ...line to "zone.tab" but that might confuse some readers (and could break anything out in the wild that relies on the third fields of "zone.tab" lines to be unique, as is true now). --ado diff -r -c before/europe after/europe *** before/europe 2012-03-03 11:49:57.414792100 -0500 --- after/europe 2012-03-03 11:50:03.779603300 -0500 *************** *** 1215,1220 **** --- 1215,1237 ---- # However, Moscow did not observe daylight saving in 1945, so # this was equivalent to CEMT (GMT+3), not GMT+4. + # From Tobias Conradi (2011-09-12): + # The German enclave of Büsingen (http://www.buesingen.de/), + # surrounded by the Swiss canton Schaffhausen, + # did not start observing DST in 1980 as the rest of DE + # (West Germany at that time) and DD (East Germany at that time) did. + # DD merged into DE, the area is currently covered by code DE in ISO 3166-1, + # which in turn is covered by the zone Europe/Berlin. + # + # Source for the time in Büsingen 1980: + # <a href=" http://www.videoportal.sf.tv/video?id=c012c029-03b7-4c2b-9164-aa5902cd58d3"> + # http://www.videoportal.sf.tv/video?id=c012c029-03b7-4c2b-9164-aa5902cd58d3 + # </a> + + # From Arthur David Olson (2012-03-03): + # Büsingen and Zurich have shared clocks since 1970; + # we don't need a new zone. + # We do want to reflect Büsingen's status in zone.tab # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Germany 1946 only - Apr 14 2:00s 1:00 S diff -r -c before/zone.tab after/zone.tab *** before/zone.tab 2012-03-03 11:50:00.971598300 -0500 --- after/zone.tab 2012-03-03 11:50:07.071209000 -0500 *************** *** 141,147 **** CD -1140+02728 Africa/Lubumbashi east Dem. Rep. of Congo CF +0422+01835 Africa/Bangui CG -0416+01517 Africa/Brazzaville ! CH +4723+00832 Europe/Zurich CI +0519-00402 Africa/Abidjan CK -2114-15946 Pacific/Rarotonga CL -3327-07040 America/Santiago most locations --- 141,147 ---- CD -1140+02728 Africa/Lubumbashi east Dem. Rep. of Congo CF +0422+01835 Africa/Bangui CG -0416+01517 Africa/Brazzaville ! CH +4723+00832 Europe/Zurich Switzerland, Busingen Germany CI +0519-00402 Africa/Abidjan CK -2114-15946 Pacific/Rarotonga CL -3327-07040 America/Santiago most locations *************** *** 160,166 **** CX -1025+10543 Indian/Christmas CY +3510+03322 Asia/Nicosia CZ +5005+01426 Europe/Prague ! DE +5230+01322 Europe/Berlin DJ +1136+04309 Africa/Djibouti DK +5540+01235 Europe/Copenhagen DM +1518-06124 America/Dominica --- 160,166 ---- CX -1025+10543 Indian/Christmas CY +3510+03322 Asia/Nicosia CZ +5005+01426 Europe/Prague ! DE +5230+01322 Europe/Berlin Germany (except Busingen) DJ +1136+04309 Africa/Djibouti DK +5540+01235 Europe/Copenhagen DM +1518-06124 America/Dominica