FW: Europe/Finland DST correction for years 1981 and 1982

Olson, Arthur David (NIH/NCI) [E] olsona at dc37a.nci.nih.gov
Thu Jul 15 13:46:14 UTC 2010


I'm forwarding this message from Janne Snabb, who is not on the time zone mailing list. Those of you who are on the list, please direct replies appropriately.

				--ado

-----Original Message-----
From: Janne Snabb [mailto:snabb at epipe.com] 
Sent: Thursday, July 15, 2010 1:21
To: tz at lecserver.nci.nih.gov
Subject: Europe/Finland DST correction for years 1981 and 1982

Hi,

I noticed that the Finland data is not accurate for years 1981 and
1982. During these two first trial years the DST adjustment was
made one hour earlier than in forthcoming years. Starting 1983 the
adjustment was made according to the central European standards.

This is documented in Heikki Oja: Aikakirja 2007, published by The
Almanac Office of University of Helsinki, ISBN 952-10-3221-9,
available online (in Finnish) at:

   http://almanakka.helsinki.fi/aikakirja/Aikakirja2007kokonaan.pdf

Page 105 (56 in PDF version) has a handy table of all past daylight
savings transitions. It is easy enough to interpret without Finnish
skills.

This is also confirmed by Finnish Broadcasting Company's archive at:

   http://www.yle.fi/elavaarkisto/?s=s&g=1&ag=5&t=&a=3401

The news clip from 1981 says that "the time between 2 and 3 o'clock
does not exist tonight".

Thus Paul Eggert's comment in the file (above the relevant entry)
is indeed correct.

Please see the diff at the bottom of this message. I believe that
it produces the desired results.

I am not a member of this list, so please CC me with any further
correspondence.

Best Regards,
--
Janne Snabb / EPIPE Communications
snabb at epipe.com - http://epipe.com/

--- europe.orig	2009-09-09 15:19:43.000000000 +0300
+++ europe	2010-07-15 07:29:53.000000000 +0300
@@ -1023,14 +1023,16 @@
  # since 1981.  Go with Strang instead.
  #
  # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
  Rule	Finland	1942	only	-	Apr	3	0:00	1:00	S
  Rule	Finland	1942	only	-	Oct	3	0:00	0	-
+Rule	Finland	1981	1982	-	Mar	lastSun	2:00	1:00	S
+Rule	Finland	1981	1982	-	Sep	lastSun	3:00	0	-
  # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
  Zone	Europe/Helsinki	1:39:52 -	LMT	1878 May 31
  			1:39:52	-	HMT	1921 May    # Helsinki Mean Time
-			2:00	Finland	EE%sT	1981 Mar 29 2:00
+			2:00	Finland	EE%sT	1983
  			2:00	EU	EE%sT

  # Aaland Is
  Link	Europe/Helsinki	Europe/Mariehamn



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