diff --git a/amath.1 b/amath.1
index 29a51737..c06e45ce 100644
--- a/amath.1
+++ b/amath.1
@@ -20,7 +20,7 @@
 .\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-.TH amath 1 "Version 1.8.1" "May 1 2017"
+.TH amath 1 "Version 1.8.1" "April 22 2017"
 .SH NAME
 amath \- Simple command line calculator
 .SH SYNOPSIS
diff --git a/src/amath.h b/src/amath.h
index 06a5eed1..400662d0 100644
--- a/src/amath.h
+++ b/src/amath.h
@@ -281,7 +281,7 @@ typedef int bool;
 #endif
 /******************************************************************************/
 #define TXTARCH          TXTCPU TXTFPU
-#define RELDATESTAMP     "(01-05-2017)"
+#define RELDATESTAMP     "(22-04-2017)"
 #define TXTDOSVERSION    "\0$VER: amath 1.81" SPACE RELDATESTAMP SPACE TXTARCH
 #define TXTTITLE         "amath version 1.8.1"
 #define TXTCOPYRIGHT     "(c) 2017 Carsten Sonne Larsen"
diff --git a/src/clib/amathc.3 b/src/clib/amathc.3
index f1573b81..13e401cf 100644
--- a/src/clib/amathc.3
+++ b/src/clib/amathc.3
@@ -20,7 +20,7 @@
 .\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-.TH "amathc.h" 3 "Version 1.8.1" "May 1 2017"
+.TH "amathc.h" 3 "Version 1.8.1" "April 22 2017"
 .SH NAME
 amathc.h \- C functions for manipulating strings and memory
 .SH SYNOPSIS
diff --git a/src/cplex/amathi.3 b/src/cplex/amathi.3
index 8607f678..6fcd9e6d 100644
--- a/src/cplex/amathi.3
+++ b/src/cplex/amathi.3
@@ -20,7 +20,7 @@
 .\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-.TH "mathi.h" 3 "Version 1.8.1" "May 1 2017"
+.TH "mathi.h" 3 "Version 1.8.1" "April 22 2017"
 .SH NAME
 mathi.h \- Complex numbers math library
 .SH SYNOPSIS
diff --git a/src/real/amathr.3 b/src/real/amathr.3
index 83831afc..e6b07dca 100644
--- a/src/real/amathr.3
+++ b/src/real/amathr.3
@@ -20,7 +20,7 @@
 .\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-.TH "mathr.h" 3 "Version 1.8.1" "May 1 2017"
+.TH "mathr.h" 3 "Version 1.8.1" "April 22 2017"
 .SH NAME
 mathr.h \- Real numbers math library 
 .SH SYNOPSIS