[tz] 1948-1951 Asia/Tokyo DST information

Brian Inglis Brian.Inglis at SystematicSw.ab.ca
Sat Sep 8 14:13:01 UTC 2018

On 2018-09-08 01:50, Phake Nick wrote:
> 2018-09-08 15:36 "Paul Eggert" wrote:
>> On 2018-09-08 01:17, Phake Nick wrote:
>>> The law cited in the latest commit do say the DST en at 00:00 on the day 
>>> after the second Saturday in September, however the second line of the
>>> law write that "the Second Saturday in September would have 25 hours in a
>>> day".
>> Those mean the same thing. Since DST ends at 00:00 the day after Saturday,
>> the clock jumps back from 24:00 on Saturday to 23:00 on Saturday, and
>> Saturday has 25 hours.
> Not really. It would mean the Sunday's clock go to 24:59 before jumping to 00:00
> on Sunday. The official time the DST end is "00:00am on the next day after the
> second Saturday of September". So it isn't ending before the day change.

Please show references to these clocks that indicate up to 25 hours at DST end
and 23 hours at DST start.
Cultural references to time adjustments like DST, leap seconds, and leap years,
tell you very little about how clocks are expected to operate.
The North American power industry refers to the 25th hour, which is the repeated
third hour, as hour 2*, and military time usage runs from 0100Z to 2459Z to
avoid midnight confusion, instead of 0000Z to 2359Z, but all use the same clocks.

Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada

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