--- old/make/data/tzdata/etcetera	2016-10-03 12:26:42.665977600 +0530
+++ new/make/data/tzdata/etcetera	2016-10-03 12:26:41.914327300 +0530
@@ -31,6 +31,13 @@
 # need now for the entries that are not on UTC are for ships at sea
 # that cannot use POSIX TZ settings.
 
+# Starting with POSIX 1003.1-2001, the entries below are all
+# unnecessary as settings for the TZ environment variable.  E.g.,
+# instead of TZ='Etc/GMT+4' one can use the POSIX setting TZ='<-04>+4'.
+#
+# Do not use a POSIX TZ setting like TZ='GMT+4', which is four hours
+# behind GMT but uses the completely misleading abbreviation "GMT".
+
 Zone	Etc/GMT		0	-	GMT
 Zone	Etc/UTC		0	-	UTC
 Zone	Etc/UCT		0	-	UCT
@@ -49,23 +56,13 @@
 Link	Etc/GMT				Etc/GMT+0
 Link	Etc/GMT				Etc/GMT0
 
-# We use POSIX-style signs in the Zone names and the output abbreviations,
+# Be consistent with POSIX TZ settings in the Zone names,
 # even though this is the opposite of what many people expect.
 # POSIX has positive signs west of Greenwich, but many people expect
 # positive signs east of Greenwich.  For example, TZ='Etc/GMT+4' uses
-# the abbreviation "GMT+4" and corresponds to 4 hours behind UT
+# the abbreviation "-04" and corresponds to 4 hours behind UT
 # (i.e. west of Greenwich) even though many people would expect it to
 # mean 4 hours ahead of UT (i.e. east of Greenwich).
-#
-# In the draft 5 of POSIX 1003.1-200x, the angle bracket notation allows for
-# TZ='<GMT-4>+4'; if you want time zone abbreviations conforming to
-# ISO 8601 you can use TZ='<-0400>+4'.  Thus the commonly-expected
-# offset is kept within the angle bracket (and is used for display)
-# while the POSIX sign is kept outside the angle bracket (and is used
-# for calculation).
-#
-# Do not use a TZ setting like TZ='GMT+4', which is four hours behind
-# GMT but uses the completely misleading abbreviation "GMT".
 
 # Earlier incarnations of this package were not POSIX-compliant,
 # and had lines such as
@@ -74,30 +71,31 @@
 # way does a
 #		zic -l GMT-12
 # so we moved the names into the Etc subdirectory.
+# Also, the time zone abbreviations are now compatible with %z.
 
-Zone	Etc/GMT-14	14	-	GMT-14	# 14 hours ahead of GMT
-Zone	Etc/GMT-13	13	-	GMT-13
-Zone	Etc/GMT-12	12	-	GMT-12
-Zone	Etc/GMT-11	11	-	GMT-11
-Zone	Etc/GMT-10	10	-	GMT-10
-Zone	Etc/GMT-9	9	-	GMT-9
-Zone	Etc/GMT-8	8	-	GMT-8
-Zone	Etc/GMT-7	7	-	GMT-7
-Zone	Etc/GMT-6	6	-	GMT-6
-Zone	Etc/GMT-5	5	-	GMT-5
-Zone	Etc/GMT-4	4	-	GMT-4
-Zone	Etc/GMT-3	3	-	GMT-3
-Zone	Etc/GMT-2	2	-	GMT-2
-Zone	Etc/GMT-1	1	-	GMT-1
-Zone	Etc/GMT+1	-1	-	GMT+1
-Zone	Etc/GMT+2	-2	-	GMT+2
-Zone	Etc/GMT+3	-3	-	GMT+3
-Zone	Etc/GMT+4	-4	-	GMT+4
-Zone	Etc/GMT+5	-5	-	GMT+5
-Zone	Etc/GMT+6	-6	-	GMT+6
-Zone	Etc/GMT+7	-7	-	GMT+7
-Zone	Etc/GMT+8	-8	-	GMT+8
-Zone	Etc/GMT+9	-9	-	GMT+9
-Zone	Etc/GMT+10	-10	-	GMT+10
-Zone	Etc/GMT+11	-11	-	GMT+11
-Zone	Etc/GMT+12	-12	-	GMT+12
+Zone	Etc/GMT-14	14	-	+14
+Zone	Etc/GMT-13	13	-	+13
+Zone	Etc/GMT-12	12	-	+12
+Zone	Etc/GMT-11	11	-	+11
+Zone	Etc/GMT-10	10	-	+10
+Zone	Etc/GMT-9	9	-	+09
+Zone	Etc/GMT-8	8	-	+08
+Zone	Etc/GMT-7	7	-	+07
+Zone	Etc/GMT-6	6	-	+06
+Zone	Etc/GMT-5	5	-	+05
+Zone	Etc/GMT-4	4	-	+04
+Zone	Etc/GMT-3	3	-	+03
+Zone	Etc/GMT-2	2	-	+02
+Zone	Etc/GMT-1	1	-	+01
+Zone	Etc/GMT+1	-1	-	-01
+Zone	Etc/GMT+2	-2	-	-02
+Zone	Etc/GMT+3	-3	-	-03
+Zone	Etc/GMT+4	-4	-	-04
+Zone	Etc/GMT+5	-5	-	-05
+Zone	Etc/GMT+6	-6	-	-06
+Zone	Etc/GMT+7	-7	-	-07
+Zone	Etc/GMT+8	-8	-	-08
+Zone	Etc/GMT+9	-9	-	-09
+Zone	Etc/GMT+10	-10	-	-10
+Zone	Etc/GMT+11	-11	-	-11
+Zone	Etc/GMT+12	-12	-	-12