Index: date_parsing.hpp
===================================================================
--- date_parsing.hpp	(revision 43927)
+++ date_parsing.hpp	(working copy)
@@ -210,7 +210,7 @@
     inline 
     date_type
     from_stream_type(iterator_type& beg, 
-                     iterator_type& end,
+                     iterator_type& /*end*/,
                      std::string) 
     {
       return parse_date<date_type>(*beg);
@@ -246,7 +246,7 @@
     inline 
     date_type
     from_stream_type(iterator_type& beg, 
-                     iterator_type& end,
+                     iterator_type& /*end*/,
                      std::wstring) {
       std::wstring ws = *beg;
       std::stringstream ss("");
Index: local_timezone_defs.hpp
===================================================================
--- local_timezone_defs.hpp	(revision 43927)
+++ local_timezone_defs.hpp	(working copy)
@@ -66,7 +66,7 @@
          if (y < 2007) return Apr;
          return Mar;
        }
-       static day_of_week_type end_day(year_type y) {return Sunday;}
+       static day_of_week_type end_day(year_type /*y*/) {return Sunday;}
        static month_type end_month(year_type y) 
        {
          if (y < 2007) return Oct;
Index: period_parser.hpp
===================================================================
--- period_parser.hpp	(revision 43927)
+++ period_parser.hpp	(working copy)
@@ -119,7 +119,7 @@
     period_type get_period(stream_itr_type& sitr, 
                            stream_itr_type& stream_end,
                            std::ios_base& a_ios, 
-                           const period_type& p,
+                           const period_type& /*p*/,
                            const duration_type& dur_unit,
                            const facet_type& facet) const 
     {
Index: time.hpp
===================================================================
--- time.hpp	(revision 43927)
+++ time.hpp	(working copy)
@@ -77,14 +77,14 @@
     /*! Optional bool parameter will return time zone as an offset 
      * (ie "+07:00"). Empty string is returned for classes that do 
      * not use a time_zone */
-    std::string zone_name(bool as_offset=false) const
+    std::string zone_name(bool /*as_offset*/ = false) const
     {
       return time_system::zone_name(time_);
     }
     /*! Optional bool parameter will return time zone as an offset 
      * (ie "+07:00"). Empty string is returned for classes that do 
      * not use a time_zone */
-    std::string zone_abbrev(bool as_offset=false) const
+    std::string zone_abbrev(bool /*as_offset*/ = false) const
     {
       return time_system::zone_name(time_);
     }
Index: time_system_split.hpp
===================================================================
--- time_system_split.hpp	(revision 43927)
+++ time_system_split.hpp	(working copy)
@@ -76,7 +76,7 @@
 
     static time_rep_type get_time_rep(const date_type& day,
                                       const time_duration_type& tod,
-                                      date_time::dst_flags dst=not_dst)
+                                      date_time::dst_flags /*dst*/ = not_dst)
     {
       if(day.is_special() || tod.is_special()) {
         if(day.is_not_a_date() || tod.is_not_a_date_time()) {