Seeking verification

Mon Jun 6 14:21:53 UTC 2011

On May 18, 2011, at 8:02 AM, Steven Abner wrote:

> 
> On May 15, 2011, at 8:59 PM, Olson, Arthur David (NIH/NCI) [E] wrote:
> 
>> Your message indicates that you're using 2010 files; you may want to pick up...
>>        ftp://elsie.nci.nih.gov/pub/tzdata2011g.tar.gz
>> ...which contains the most up-to-date information, then see how it compares with your information.
> 
> Hi,
>    I  built your zic from tzcode2011d, used your tzdata2011g, and  America/Metlakatla
> changed for dates in question (1983 - 2037), was "YST/AKST/AKDT", it now reports for both STD/DST "MeST" with alternating
> -8, -7 gmt offsets. From "wiki" it looks like it should be PST/AKDT with no alternating of gmt offsets.
> Best solution I can offer is(assuming its not "MeST/MeST" and this is what happened):
> 
> # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
> Rule	Metlak	1983	2006	-	Oct	lastSun	2:00	0	PS
> Rule	Metlak	1984	1986	-	Apr	lastSun	2:00	0	AKD
> Rule	Metlak	1987	2006	-	Apr	Sun>=1	2:00	0	AKD
> Rule	Metlak	2007	max	-	Mar	Sun>=8	2:00	0	AKD
> Rule	Metlak	2007	max	-	Nov	Sun>=1	2:00	0	PS
> 
> Zone America/Metlakatla	 15:13:42 -	LMT	1867 Oct 18
> 			 -8:46:18 -	LMT	1900 Aug 20 12:00
> 			 -8:00	-	PST	1942
> 			 -8:00	US	P%sT	1946
> 			 -8:00	-	PST	1969
> 			 -8:00	US	P%sT	1983 Oct 30 2:00
> 			 -8:00	Metlak	%sT
> 
> with an alternate system, you can force alternating STD/DST, not sure how to get
> yours from STD/STD.
> 
> For Europe/Sofia, I have at 2:00, you have at 3:00 on  Sun Sep 26 1982.
> The Zone data states: 1982 Sep 26  2:00.
> 
> For Atlantic/Canary, I have at 1:00, you have at 2:00 on Sun Sep 28 1980.
> The Zone data states: 1980 Sep 28 0:00s
> 
> For Europe/Simferopol, I have the single date/time: Sun Mar 31 03:00:00 1996
> The file has two dates: Sun Mar 31 00:00:00 1996 and Sun Mar 31 04:00:00 1996
> 
> For Asia/Phnom_Penh, Asia/Vientiane, Asia/Ho_Chi_Minh:
> I have Sat Mar 11 00:01:00 1911 and Wed May  1 00:00:00 1912
> The file yields Sun Mar 12 00:01:00 1911 and Thu May  2 00:00:00 1912
> Zone data has: 1911 Mar 11 0:01 and 1912 May.
> 
> Something that doesn't show up on your files that I would like to verify, please, is
> For Zone America/Sitka you have -14:58:47 for LMT. Is that correct or should it be
> like other Alaska dates 14:58:47?
> 
> Again, again, this is just questioning my accuracy or inaccuracy in creating a parser.
> I needed an alternate means of accessing your wonderfully gathered and created data.
> 
> I would also like to see if you are open to possible changes to your data, some as simple as:
> changing a SAVE time 0:00 to 0, and others a little more complex like the Rule Metlak as above.
> 

Hi again,
    Since I hadn't heard back, I've decided to send you the alternative files. Your parser won't directly handle
the Europe file, as it follows the majority of your rules, but created a different exception, which should allow more
latitude for your rules, while hopefully simplifying exceptions in the parser unit. The "%" in front of "LETTER/S" signals
direct or literal replacement much like the "-" is to "RULES".  The Europe file was also rearranged slightly to group
regions together for analysis.

Thanks again and hope these help.
Steve

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