[tz] [PROPOSED PATCH] Adjust pre-1940 Iceland data to match the Iceland Almanak.

[Tim Parenti]

Attached is a small typo fix in commentary for these Iceland changes.
On 22 Nov 2014 23:09, Paul Eggert wrote:
> * europe (Iceland, Atlantic/Reykjavik):
> Correct entries for 1939, 1921, 1919, and 1837-1907.
> Coalesce some other entries, for simplicity.
> * NEWS: Document this.
> ---
>   NEWS   |  6 ++++++
>   europe | 29 +++++++++++++----------------
>   2 files changed, 19 insertions(+), 16 deletions(-)
>
> diff --git a/NEWS b/NEWS
> index 45e4f84..2cb5ff9 100644
> --- a/NEWS
> +++ b/NEWS
> @@ -2,6 +2,12 @@ News for the tz database
>   
>   Unreleased, experimental changes
>   
> +  Changes affecting past time stamps
> +
> +    Iceland observed DST in 1919 and 1921, and its 1939 fallbacck
> +    transition was Oct. 29, not Nov. 29.  Remove incorrect data from
> +    Shanks about time in Iceland between 1837 and 1908.
> +
>     Changes affecting code
>   
>       tzalloc now scrubs time zone abbreviations compatibly with the way
> diff --git a/europe b/europe
> index 5e78c54..fc7a76a 100644
> --- a/europe
> +++ b/europe
> @@ -1407,35 +1407,32 @@ Zone	Europe/Budapest	1:16:20 -	LMT	1890 Oct
>   # might be a reference to the Julian calendar as opposed to Gregorian, or it
>   # might mean something else (???).
>   #
> -# From Paul Eggert (2006-03-22):
> -# The Iceland Almanak, Shanks & Pottenger, and Whitman disagree on many points.
> -# We go with the Almanak, except for one claim from Shanks & Pottenger, namely
> -# that Reykavik was 21W57 from 1837 to 1908, local mean time before that.
> +# From Paul Eggert (2014-11-22):
> +# The information below is taken from the 1988 Almanak; see
> +# http://www.almanak.hi.is/klukkan.html
>   #
>   # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
> -Rule	Iceland	1917	1918	-	Feb	19	23:00	1:00	S
> +Rule	Iceland	1917	1919	-	Feb	19	23:00	1:00	S
>   Rule	Iceland	1917	only	-	Oct	21	 1:00	0	-
> -Rule	Iceland	1918	only	-	Nov	16	 1:00	0	-
> +Rule	Iceland	1918	1919	-	Nov	16	 1:00	0	-
> +Rule	Iceland	1921	only	-	Mar	19	23:00	1:00	S
> +Rule	Iceland	1921	only	-	Jun	23	 1:00	0	-
>   Rule	Iceland	1939	only	-	Apr	29	23:00	1:00	S
> -Rule	Iceland	1939	only	-	Nov	29	 2:00	0	-
> +Rule	Iceland	1939	only	-	Oct	29	 2:00	0	-
>   Rule	Iceland	1940	only	-	Feb	25	 2:00	1:00	S
> -Rule	Iceland	1940	only	-	Nov	 3	 2:00	0	-
> -Rule	Iceland	1941	only	-	Mar	 2	 1:00s	1:00	S
> -Rule	Iceland	1941	only	-	Nov	 2	 1:00s	0	-
> -Rule	Iceland	1942	only	-	Mar	 8	 1:00s	1:00	S
> -Rule	Iceland	1942	only	-	Oct	25	 1:00s	0	-
> +Rule	Iceland	1940	1941	-	Nov	Sun>=2	 1:00s	0	-
> +Rule	Iceland	1941	1942	-	Mar	Sun>=2	 1:00s	1:00	S
>   # 1943-1946 - first Sunday in March until first Sunday in winter
>   Rule	Iceland	1943	1946	-	Mar	Sun>=1	 1:00s	1:00	S
> -Rule	Iceland	1943	1948	-	Oct	Sun>=22	 1:00s	0	-
> +Rule	Iceland	1942	1948	-	Oct	Sun>=22	 1:00s	0	-
>   # 1947-1967 - first Sunday in April until first Sunday in winter
>   Rule	Iceland	1947	1967	-	Apr	Sun>=1	 1:00s	1:00	S
> -# 1949 Oct transition delayed by 1 week
> +# 1949 and 1969 Oct transitions delayed by 1 week
>   Rule	Iceland	1949	only	-	Oct	30	 1:00s	0	-
>   Rule	Iceland	1950	1966	-	Oct	Sun>=22	 1:00s	0	-
>   Rule	Iceland	1967	only	-	Oct	29	 1:00s	0	-
>   # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
> -Zone Atlantic/Reykjavik	-1:27:24 -	LMT	1837
> -			-1:27:48 -	RMT	1908 # Reykjavik Mean Time?
> +Zone Atlantic/Reykjavik	-1:28	-	LMT	1908
>   			-1:00	Iceland	IS%sT	1968 Apr  7  1:00s
>   			 0:00	-	GMT
>   

-------------- next part --------------
From 0ce4339c998d9178d35e4992ad6122dee1c24c90 Mon Sep 17 00:00:00 2001
From: Tim Parenti <tim at timtimeonline.com>
Date: Sun, 23 Nov 2014 23:32:10 -0500
Subject: * europe (Iceland): Typo fix in commentary.

---
 europe | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/europe b/europe
index fc7a76a..60dfc1d 100644
--- a/europe
+++ b/europe
@@ -1427,7 +1427,7 @@ Rule	Iceland	1943	1946	-	Mar	Sun>=1	 1:00s	1:00	S
 Rule	Iceland	1942	1948	-	Oct	Sun>=22	 1:00s	0	-
 # 1947-1967 - first Sunday in April until first Sunday in winter
 Rule	Iceland	1947	1967	-	Apr	Sun>=1	 1:00s	1:00	S
-# 1949 and 1969 Oct transitions delayed by 1 week
+# 1949 and 1967 Oct transitions delayed by 1 week
 Rule	Iceland	1949	only	-	Oct	30	 1:00s	0	-
 Rule	Iceland	1950	1966	-	Oct	Sun>=22	 1:00s	0	-
 Rule	Iceland	1967	only	-	Oct	29	 1:00s	0	-
-- 
2.1.1