[tz] draft of change summary for next tz release

Paul Eggert eggert at cs.ucla.edu
Wed Sep 18 00:59:16 UTC 2013

Andy Heninger wrote:

> Can I suggest that we split this into two updates, the first containing
> only the Fiji change

For convenience, if you'd like to have just the Fiji patch
(relative to 2013d) it's appended to this email.

As for redoing the patches and generating two updates,
sorry, I thought I'd covered this point earlier, but I
can't seem to find it in my outgoing mail, so I guess not.
Anyway, in the past we haven't bothered to split out changes
like that, and common practice has been for software
distributions to incorporate just the changes they want, if
they're leery about upgrading to a new release.  For example,
Fedora 19 is using 2013c, but is incorporating post-2013c
patches for Morocco and Israel; see:


I expect this sort of thing to continue with 2013d too, as
well as with 2013e whenever it comes out.

Here's the Fiji-only patch that I mentioned above.  (I haven't tested it.)

--- old/australasia
+++ new/australasia
@@ -352,16 +352,25 @@ Zone	Indian/Cocos	6:27:40	-	LMT	1900
 # today confirmed that Fiji will start daylight savings at 2 am on Sunday 21st
 # October 2012 and end at 3 am on Sunday 20th January 2013.
 # http://www.fiji.gov.fj/index.php?option=com_content&view=article&id=6702&catid=71&Itemid=155
+# From the Fijian Government Media Center (2013-08-30) via David Wheeler:
+# Fiji will start daylight savings on Sunday 27th October, 2013 and end at 3am
+# on Sunday 19th January, 2014....  move clocks forward by one hour from 2am
+# http://www.fiji.gov.fj/Media-Center/Press-Releases/DAYLIGHT-SAVING-STARTS-ON-SUNDAY,-27th-OCTOBER-201.aspx
-# From Paul Eggert (2012-08-31):
-# For now, guess a pattern of the penultimate Sundays in October and January.
+# From Paul Eggert (2013-09-09):
+# For now, guess that Fiji springs forward the Sunday before the fourth
+# Monday in October.  This matches both recent practice and
+# timeanddate.com's current spring-forward prediction.
+# For the January 2014 transition we guessed right while timeanddate.com
+# guessed wrong, so leave the fall-back prediction alone.
 Rule	Fiji	1998	1999	-	Nov	Sun>=1	2:00	1:00	S
 Rule	Fiji	1999	2000	-	Feb	lastSun	3:00	0	-
 Rule	Fiji	2009	only	-	Nov	29	2:00	1:00	S
 Rule	Fiji	2010	only	-	Mar	lastSun	3:00	0	-
-Rule	Fiji	2010	max	-	Oct	Sun>=18	2:00	1:00	S
+Rule	Fiji	2010	max	-	Oct	Sun>=21	2:00	1:00	S
 Rule	Fiji	2011	only	-	Mar	Sun>=1	3:00	0	-
 Rule	Fiji	2012	max	-	Jan	Sun>=18	3:00	0	-

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