[tz] Problem with historical Asia/Manila?

[Paul Goyette]

On Thu, 2 Mar 2017, Paul Eggert wrote:

> Paul Goyette wrote:
>> According to the asia file, the Philippines jumped 24 hours on May 11, 
>> 1899,
>> from -15:56:00 to +8:04:00 (they moved the international date line?)
>> 
>> # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
>> Zone    Asia/Manila     -15:56:00 -     LMT     1844 Dec 31
>>                         8:04:00 -       LMT     1899 May 11
>>                         8:00    Phil    +08/+09 1942 May
>
> Yes, they moved the date line. But this occurred in 1844, not in 1899. I 
> think you misread the UNTIL column.  zdump -i reports:
>
> TZ="Asia/Manila"
> -	-	-1556	LMT
> 1845-01-01	00	+0804	LMT
> 1899-05-10	23:56	+08
> ...
>
> so the big change occurred in 1844, and the four-minute change occurred in 
> 1899, which is what the table says.

Yes, as expected, I misinterpreted the data!  Thanks for clarifying!

(FWIW, zdump indeed shows the big jump going from 1844-12-30 23:59:59 
to 1845-01-01 00:00:00 completely skipping over Dec. 31st!)


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