[tz] Fallback rules?

Random832 random832 at fastmail.com
Wed Nov 4 01:14:24 UTC 2015


Alfie John <alfie at fastmail.com> writes:
> Hi TZers,
>
> Sorry if this has been asked before, but I couldn't find any
> documentation on the rules of what should happen for the following
> circumstances.
>
> Here's the definition for Australia/Brisbane:
>
>  # Rule  NAME    FROM    TO      TYPE IN     ON      AT    SAVE  LETTER/S
>  Rule    AQ      1971    only    -    Oct    lastSun 2:00s 1:00  D
>  Rule    AQ      1972    only    -    Feb    lastSun 2:00s 0     S
>  Rule    AQ      1989    1991    -    Oct    lastSun 2:00s 1:00  D
>  Rule    AQ      1990    1992    -    Mar    Sun>=1  2:00s 0     S
>  Rule    Holiday 1992    1993    -    Oct    lastSun 2:00s 1:00  D
>  Rule    Holiday 1993    1994    -    Mar    Sun>=1  2:00s 0     S
>  Zone Australia/Brisbane 10:12:08 -   LMT    1895
>                          10:00   Aus  AE%sT  1971
>                          10:00   AQ   AE%sT
>
> As the zone ends with AQ, and AQ does not have a "max" ending date, what
> should Australia/Brisbane fall back to after 1992?

Er, there is a spring forward rule in 1993, and a fall back rule in
1994, and it ends on standard time.



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