Improve the wording a bit
diff --git a/Doc/lib/libtime.tex b/Doc/lib/libtime.tex
index 6597ac5..eb4d719 100644
--- a/Doc/lib/libtime.tex
+++ b/Doc/lib/libtime.tex
@@ -296,7 +296,7 @@
Support for the \code{\%Z} directive is based on the values contained in
\code{tzname} and whether \code{daylight} is true. Because of this,
-it is platform-specific without recognition for UTC and GMT which are
+it is platform-specific except for recognizing UTC and GMT which are
always known (and are considered to be non-daylight savings
timezones).
\end{funcdesc}