Assume zic 2004 or later in "Apr Sun>=25" etc.

* asia (Zion), northamerica (Toronto): Use constructs like
"Apr Sun>=25" and "Apr Fri<=1" that have been supported by zic
since 2004.  Although Solaris 8 used pre-2004 zic, Solaris 8
reached end-of-life in March 2012.
* zic.8: State more clearly that "Apr Sun>=25" is allowed.

1 files changed, 9 insertions, 0 deletions

diff --git a/zic.8 b/zic.8
index 6d893c2..89ea2d9 100644
--- a/zic.8
+++ b/zic.8
@@ -317,6 +317,15 @@ may be abbreviated or spelled out in full.
 There must be no white space characters within the
 .B ON
 field.
+The
+.q <=
+and
+.q >=
+constructs can result in a day in the neighboring month;
+for example, the IN-ON combination
+.q "Oct Sun>=31"
+stands for the first Sunday on or after October 31,
+even if that Sunday occurs in November.
 .TP
 .B AT
 Gives the time of day at which the rule takes effect,