diff --git a/demos/ozdemo.c b/demos/ozdemo.c
index 05e9d93e..217fe4fe 100644
--- a/demos/ozdemo.c
+++ b/demos/ozdemo.c
@@ -1,8 +1,6 @@
 /*
  *  ozdemo.c           - A demo program using PDCurses. The program
  *  (formerly newdemo)   illustrates the use of colors for text output.
- *
- *  Hacks by jbuhler@cs.washington.edu on 12/29/96
  */
 
 #include <signal.h>
diff --git a/demos/rain.c b/demos/rain.c
index b8ef4e53..32acd671 100644
--- a/demos/rain.c
+++ b/demos/rain.c
@@ -30,7 +30,7 @@
 #include <stdlib.h>
 #include <time.h>
 
-/* rain 11/3/1980 EPS/CITHEP */
+/* rain 1980-11-3 EPS/CITHEP */
 
 static int next_j(int j)
 {
diff --git a/demos/testcurs.c b/demos/testcurs.c
index e3522350..b2b24b08 100644
--- a/demos/testcurs.c
+++ b/demos/testcurs.c
@@ -2,8 +2,8 @@
  * This is a test program for PDCurses. Originally by
  * John Burnell <johnb@kea.am.dsir.govt.nz>
  *
- *  wrs(5/28/93) -- modified to be consistent (perform identically)
- *                  with either PDCurses or under Unix System V, R4
+ *  wrs (1993-5-28) -- modified to be consistent (perform identically)
+ *                     with either PDCurses or under Unix System V, R4
  */
 
 #ifndef _XOPEN_SOURCE_EXTENDED
diff --git a/demos/tui.c b/demos/tui.c
index 98c54aef..899739e2 100644
--- a/demos/tui.c
+++ b/demos/tui.c
@@ -3,7 +3,7 @@
  * 'textual user interface'
  *
  * Author : P.J. Kunst <kunst@prl.philips.nl>
- * Date   : 25-02-93
+ * Date   : 1993-02-25
  */
 
 #include <ctype.h>
diff --git a/demos/tui.h b/demos/tui.h
index a272c54c..0bb4c68e 100644
--- a/demos/tui.h
+++ b/demos/tui.h
@@ -2,7 +2,7 @@
  * 'textual user interface'
  *
  * Author : P.J. Kunst <kunst@prl.philips.nl>
- * Date   : 25-02-93
+ * Date   : 1993-02-25
  */
 
 #ifndef _TUI_H_
diff --git a/demos/tuidemo.c b/demos/tuidemo.c
index f1cb0033..0d4fd4fb 100644
--- a/demos/tuidemo.c
+++ b/demos/tuidemo.c
@@ -1,6 +1,6 @@
 /*
  * Author : P.J. Kunst <kunst@prl.philips.nl>
- * Date   : 25-02-93
+ * Date   : 1993-02-25
  *
  * Purpose: This program demonstrates the use of the 'curses' library
  *          for the creation of (simple) menu-operated programs.