Index: trunk/admin/include/calendar.js
===================================================================
diff -u -r13 -r381
--- trunk/admin/include/calendar.js	(.../calendar.js)	(revision 13)
+++ trunk/admin/include/calendar.js	(.../calendar.js)	(revision 381)
@@ -1074,8 +1074,18 @@
       if (b[i] == "y") {
          y = a[i];
       }
-      if (b[i] == "yy") {
-         y = parseInt(a[i]) + 1900;
+      if (b[i] == "yy") {      	
+      	if (a[i].length == 4) {
+      		y = a[i];
+      	}
+      	else {
+      		if (parseInt(a[i]) < 70) {
+         		y = parseInt(a[i]) + 2000;
+      		}
+      		else {
+      			y = parseInt(a[i]) + 1900;
+      		}
+      	}
       }
       if (b[i] == "M" || b[i] == "MM") {
          for (j = 0; j < 12; ++j) {