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-rw-r--r--doc/coreutils.texi3
1 files changed, 2 insertions, 1 deletions
diff --git a/doc/coreutils.texi b/doc/coreutils.texi
index ee4c32286..eaa6a0366 100644
--- a/doc/coreutils.texi
+++ b/doc/coreutils.texi
@@ -10183,7 +10183,8 @@ Note that this value is the number of seconds between the epoch
and the current date as defined by the localtime system call.
It isn't changed by the @option{--date} option.
@item %S
-second (00@dots{}60)
+second (00@dots{}60). The range is [00@dots{}60], and not [00@dots{}59],
+in order to accommodate the occasional positive leap second.
@item %T
time, 24-hour (hh:mm:ss)
@item %X