diff --git a/SystemTools.cxx b/SystemTools.cxx
index 9ab0fdf105fb6a384772a2851dba902a2782edf5..afc724076d3db0da674b32d0de6a926f49d08dac 100644
--- a/SystemTools.cxx
+++ b/SystemTools.cxx
@@ -9,6 +9,13 @@
   implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
   See the License for more information.
 ============================================================================*/
+
+#ifdef __osf__
+#  define _OSF_SOURCE
+#  define _POSIX_C_SOURCE 199506L
+#  define _XOPEN_SOURCE_EXTENDED
+#endif
+
 #include "kwsysPrivate.h"
 #include KWSYS_HEADER(RegularExpression.hxx)
 #include KWSYS_HEADER(SystemTools.hxx)
diff --git a/kwsysDateStamp.cmake b/kwsysDateStamp.cmake
index 32d4eef0f84be97d60445915c3f3c075002dbda7..ee024a473234b729a5503c55d35f765ad2cfd202 100644
--- a/kwsysDateStamp.cmake
+++ b/kwsysDateStamp.cmake
@@ -15,7 +15,7 @@
 SET(KWSYS_DATE_STAMP_YEAR  2010)
 
 # KWSys version date month component.  Format is MM.
-SET(KWSYS_DATE_STAMP_MONTH 04)
+SET(KWSYS_DATE_STAMP_MONTH 05)
 
 # KWSys version date day component.  Format is DD.
-SET(KWSYS_DATE_STAMP_DAY   29)
+SET(KWSYS_DATE_STAMP_DAY   04)