Fixes for Casey and Macquarie

* NEWS: Mention this.  (Thanks to Steffen Thorsen.)
* antarctica (Antarctica/Casey): +08 in winter, +11 in summer
since 2018, too.
* australasia (Antarctica/Macquarie): Stay in sync with
Hobart starting in 2011.

Author: eggert

NEWS

@@ -5,6 +5,8 @@ Unreleased, experimental changes
   Briefly:
     Revised predictions for Morocco's changes starting in 2023.
     Canada's Yukon changes to -07 on 2020-11-01, not 2020-03-08.
+    Macquarie Island has stayed in sync with Tasmania since 2011.
+    Casey, Antarctica is at +08 in summer and +11 in winter.
 
   Changes to future timestamps
 
@@ -13,6 +15,13 @@ Unreleased, experimental changes
     (Thanks to Milamber.)  The first altered prediction is for 2023,
     now predicted to spring-forward on April 30 instead of April 23.
 
+  Changes to past and future timestamps
+
+   Casey Station, Antarctica has been using +08 in summer and +11 in
+   winter since 2018.  The next transition is from +08 to +11 on
+   2020-10-04 00:01.  Also, Macquarie Island has been staying in
+   sync with Tasmania since 2011.  (Thanks to Steffen Thorsen.)
+
   Changes to past and future time zone abbreviations and DST flags
 
     Canada's Yukon, represented by America/Whitehorse and

antarctica

@@ -70,15 +70,30 @@
 # Australian Antarctica Division informed us that Casey changed time
 # zone to UTC+11 in "the morning of 22nd October 2016".
 
+# From Steffen Thorsen (2020-10-02):
+# Based on information we have received from the Australian Antarctic
+# Division, Casey station and Macquarie Island station will move to Tasmanian
+# daylight savings time on Sunday 4 October. This will take effect from 0001
+# hrs on Sunday 4 October 2020 and will mean Casey and Macquarie Island will
+# be on the same time zone as Hobart.  Some past dates too for this 3 hour
+# time change back and forth between UTC+8 and UTC+11 for Casey:
+# - 2018 Oct  7 4:00 - 2019 Mar 17 3:00 - 2019 Oct  6 3:00 - 2020 Mar  8 3:00
+# and now - 2020 Oct  4 0:01
+
 # Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
-Zone Antarctica/Casey	0	-	-00	1969
-			8:00	-	+08	2009 Oct 18  2:00
+Zone Antarctica/Casey	 0	-	-00	1969
+			 8:00	-	+08	2009 Oct 18  2:00
 			11:00	-	+11	2010 Mar  5  2:00
-			8:00	-	+08	2011 Oct 28  2:00
+			 8:00	-	+08	2011 Oct 28  2:00
 			11:00	-	+11	2012 Feb 21 17:00u
-			8:00	-	+08	2016 Oct 22
+			 8:00	-	+08	2016 Oct 22
 			11:00	-	+11	2018 Mar 11  4:00
-			8:00	-	+08
+			 8:00	-	+08	2018 Oct  7  4:00
+			11:00	-	+11	2019 Mar 17  3:00
+			 8:00	-	+08	2019 Oct  6  3:00
+			11:00	-	+11	2020 Mar  8  3:00
+			 8:00	-	+08	2020 Oct  4  0:01
+			11:00	-	+11
 Zone Antarctica/Davis	0	-	-00	1957 Jan 13
 			7:00	-	+07	1964 Nov
 			0	-	-00	1969 Feb

australasia

@@ -252,8 +252,9 @@ Zone Antarctica/Macquarie 0	-	-00	1899 Nov
 			10:00	Aus	AE%sT	1919 Apr  1  0:00s
 			0	-	-00	1948 Mar 25
 			10:00	Aus	AE%sT	1967
-			10:00	AT	AE%sT	2010 Apr  4  3:00
-			11:00	-	+11
+			10:00	AT	AE%sT	2010
+			10:00	1:00	AEDT	2011
+			10:00	AT	AE%sT
 
 # Christmas
 # Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]