[tz] Irish Standard Time vs Irish Summer Time
eggert at cs.ucla.edu
Sun Dec 10 23:12:37 UTC 2017
Lester Caine wrote:
> so should there be any timezones other than a single
> European time in the tzdb database?
Yes, of course. The EU rules cover multiple time zones and the tzdata format
needs different Zones for each. But it's more than that: the EU didn't
standardize daylight-saving transition rules until 1977. So time zone histories
that differ in the 1970-1976 period require different Zones regardless of EU
rules after 1977.
More information about the tz