diff -Nur boost_1_35_0/boost/date_time/time.hpp boost_1_35_0.patched/boost/date_time/time.hpp
--- boost_1_35_0/boost/date_time/time.hpp	2008-02-27 21:00:24.000000000 +0100
+++ boost_1_35_0.patched/boost/date_time/time.hpp	2008-04-30 23:04:21.000000000 +0200
@@ -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=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=false) const
     {
       return time_system::zone_name(time_);
     }