[tz] Japanese Summer time fallback transition in autumn 2020?

Paul Eggert eggert at cs.ucla.edu
Tue Sep 11 17:00:48 UTC 2018

One other thing. The Japanese government is considering adopting 
daylight saving time for the 2020 Tokyo Olympics. Will this issue about 
25-hour (or 26-hour) days come up in 2020? For example, could there be a 
26-hour day in September 2020 with times ranging from 00:00 to 26:00? If 
so, a *lot* of computers will have to be reprogrammed, as no software 
I'm aware of supports timestamps like that now.

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