describe about Time.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@23246 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

NEWS

@@ -47,6 +47,11 @@ with all sufficient information, see the ChangeLog file.
     * extended methods:
       * string[regexp, name] is supported for named capture.
 
+  * Time
+    * extended feature:
+      * time_t restriction is removed to represent before 1901 and after 2038.
+        Proleptic Gregorian calendar is used for old dates.
+
   * Kernel
     * extended methods:
       * respond_to? returns false for methods which simply raise