On 2018-09-18 20:59, Paul Eggert wrote about the question whether Tokyo's switch to winter time in 1951 happened at 1951-09-08T14:00Z or at 1951-09-08T15:00Z::
Possibly some people did one thing while others did the other, as the American occupiers did not always see eye-to-eye with the Japanese populace and I doubt whether it's entirely a coincidence that Japan stopped observing DST three days after US occupation ended.
Just a minor correction: I think you mean the signing of the peace treaty with Japan, online at [assets.documentcloud.org/documents/1338718/san-francisco-peace-treaty-1951.pdf]. This happened on 1951-09-08 (a Saturday) in San Francisco, as stated in the text. It is quite likely that it was done after 08:00 PPT, so that local time in Tokyo was after 1951-09-09T00:00 in either interpretation, and not three days before the switch to winter time. US occupation of Japan ended only in 1952. Michael Deckers.