diff --git a/productMods/edit/forms/personHasActivity.jsp b/productMods/edit/forms/personHasActivity.jsp
index 437fb923..1962598e 100644
--- a/productMods/edit/forms/personHasActivity.jsp
+++ b/productMods/edit/forms/personHasActivity.jsp
@@ -17,6 +17,7 @@
 <%@ page import="edu.cornell.mannlib.vitro.webapp.controller.VitroRequest"%>
 <%@ page import="edu.cornell.mannlib.vitro.webapp.web.MiscWebUtils"%>
 <%@ page import="edu.cornell.mannlib.vitro.webapp.utils.TitleCase" %>
+<%@page import="edu.cornell.mannlib.vitro.webapp.edit.n3editing.StartDateBeforeEndDate"%>
 
 <%@ page import="org.apache.commons.logging.Log" %>
 <%@ page import="org.apache.commons.logging.LogFactory" %>
@@ -243,6 +244,8 @@
         EditConfiguration.putConfigInSession(editConfig,session);
     }
     
+    editConfig.addValidator(new StartDateBeforeEndDate("startYearMonth","endYearMonth") ); 
+    
     Model model = (Model) application.getAttribute("jenaOntModel");
     String objectUri = (String) request.getAttribute("objectUri");
     if (objectUri != null) { // editing existing
diff --git a/productMods/edit/forms/personHasPositionHistory.jsp b/productMods/edit/forms/personHasPositionHistory.jsp
index fcfb15b7..c62efce5 100644
--- a/productMods/edit/forms/personHasPositionHistory.jsp
+++ b/productMods/edit/forms/personHasPositionHistory.jsp
@@ -14,11 +14,11 @@
 <%@ page import="edu.cornell.mannlib.vitro.webapp.dao.WebappDaoFactory"%>
 <%@ page import="edu.cornell.mannlib.vitro.webapp.controller.VitroRequest"%>
 <%@ page import="edu.cornell.mannlib.vitro.webapp.web.MiscWebUtils"%>
+<%@page import="edu.cornell.mannlib.vitro.webapp.edit.n3editing.StartYearBeforeEndYear"%>
+<%@page import="edu.cornell.mannlib.vitro.webapp.edit.n3editing.PersonHasPositionValidator"%>
 
 <%@ page import="org.apache.commons.logging.Log" %>
 <%@ page import="org.apache.commons.logging.LogFactory" %>
-<%@page import="edu.cornell.mannlib.vitro.webapp.edit.n3editing.StartYearBeforeEndYear"%>
-<%@page import="edu.cornell.mannlib.vitro.webapp.edit.n3editing.PersonHasPositionValidator"%>
 
 <%@ taglib prefix="c" uri="http://java.sun.com/jstl/core"%>
 <%@ taglib prefix="v" uri="http://vitro.mannlib.cornell.edu/vitro/tags" %>