diff --git a/productMods/edit/forms/addGrantRoleToPerson.jsp b/productMods/edit/forms/addGrantRoleToPerson.jsp
index 2f182051..6e36d87d 100644
--- a/productMods/edit/forms/addGrantRoleToPerson.jsp
+++ b/productMods/edit/forms/addGrantRoleToPerson.jsp
@@ -48,7 +48,10 @@ This is intended to create a set of statements like:
     String predicateUri = (String)request.getAttribute("predicateUri");
     ObjectProperty op = wdf.getObjectPropertyDao().getObjectPropertyByURI( predicateUri ); 
     if( op != null &&  op.getURIInverse() != null ){
-		%> <c:set var="inversePredicate"><%=op.getURIInverse()%></c:set> <%
+		%> 
+<%@page import="edu.cornell.mannlib.vitro.webapp.edit.n3editing.Field"%>
+<%@page import="edu.cornell.mannlib.vitro.webapp.edit.elements.DateTimeWithPrecision"%>
+<%@page import="edu.cornell.mannlib.vitro.webapp.edit.n3editing.DateTimeIntervalValidation"%><c:set var="inversePredicate"><%=op.getURIInverse()%></c:set> <%
     }else{
     	%> <c:set var="inversePredicate"></c:set> <%
     }
@@ -82,9 +85,22 @@ This is intended to create a set of statements like:
 <%@page import="edu.cornell.mannlib.vitro.webapp.beans.ObjectProperty"%><c:set var="vivoOnt" value="http://vivoweb.org/ontology" />
 <c:set var="vivoCore" value="${vivoOnt}/core#" />
 <c:set var="rdfs" value="<%= VitroVocabulary.RDFS %>" />
+<c:set var="type" value="<%= VitroVocabulary.RDF_TYPE %>" />
 <c:set var="rdf" value="<%= VitroVocabulary.RDF %>" />
 <c:set var="label" value="${rdfs}label" />
 
+<c:set var="startYearPred" value="${vivoCore}startYear" />
+<c:set var="endYearPred" value="${vivoCore}endYear" />
+<c:set var="dateTimeValueType" value="${vivoCore}DateTimeValue"/>
+<c:set var="dateTimePrecision" value="${vivoCore}dateTimePrecision"/>
+<c:set var="dateTimeValue" value="${vivoCore}dateTime"/>
+
+<c:set var="roleToInterval" value="${vivoCore}dateTimeInterval"/>
+<c:set var="intervalType" value="${vivoCore}DateTimeInterval"/>
+<c:set var="intervalToStart" value="${vivoCore}start"/>
+<c:set var="intervalToEnd" value="${vivoCore}end"/>
+
+
 <%  // set role type based on predicate
 String subjectName = ((Individual) request.getAttribute("subject")).getName();
 if ( ((String)request.getAttribute("predicateUri")).endsWith("hasPrincipalInvestigatorRole") ) { %>
@@ -124,16 +140,6 @@ if ( ((String)request.getAttribute("predicateUri")).endsWith("hasPrincipalInvest
     </c:otherwise>
 </c:choose>
 
-<c:set var="startYearUri" value="${vivoCore}startYear" />
-<v:jsonset var="startYearAssertion" >
-      ?role <${startYearUri}> ?startYear .
-</v:jsonset>
-
-<c:set var="endYearUri" value="${vivoCore}endYear" /> 
-<v:jsonset var="endYearAssertion" >
-      ?role <${endYearUri}> ?endYear .
-</v:jsonset>
-
 <v:jsonset var="n3ForGrantRole">
     @prefix core: <${vivoCore}> .
     @prefix rdf: <${rdf}> .
@@ -152,6 +158,24 @@ if ( ((String)request.getAttribute("predicateUri")).endsWith("hasPrincipalInvest
 	?role   ?inverseRolePredicate ?person.
 </v:jsonset>
 
+<v:jsonset var="n3ForStart">
+    ?role      <${roleToInterval}> ?intervalNode .    
+    ?intervalNode  <${type}> <${intervalType}> .
+    ?intervalNode <${intervalToStart}> ?startNode .    
+    ?startNode  <${type}> <${dateTimeValueType}> .
+    ?startNode  <${dateTimeValue}> ?startField.value .
+    ?startNode  <${dateTimePrecision}> ?startField.precision .
+</v:jsonset>
+
+<v:jsonset var="n3ForEnd">
+    ?role      <${roleToInterval}> ?intervalNode .    
+    ?intervalNode  <${type}> <${intervalType}> .
+    ?intervalNode <${intervalToEnd}> ?endNode .
+    ?endNode  <${type}> <${dateTimeValueType}> .
+    ?endNode  <${dateTimeValue}> ?endField.value .
+    ?endNode  <${dateTimePrecision}> ?endField.precision .
+</v:jsonset>
+
 <v:jsonset var="n3ForGrantLabel">
     @prefix rdfs: <${rdfs}> .    	
     ?grant rdfs:label ?grantLabel .               
@@ -165,22 +189,72 @@ if ( ((String)request.getAttribute("predicateUri")).endsWith("hasPrincipalInvest
         ?existingGrant rdfs:label ?existingGrantLabel . }
 </v:jsonset>
 
-<v:jsonset var="startYearQuery">
-  PREFIX core: <${vivoCore}>  
-  SELECT ?existingStartYear WHERE { ?role  core:startYear ?existingStartYear .}       
-</v:jsonset>
-
-<v:jsonset var="endYearQuery">
-PREFIX core: <${vivoCore}>  
-  SELECT ?existingStartYear WHERE { ?role  core:endYear ?existingStartYear .}
-</v:jsonset>
-
 <v:jsonset var="grantQuery">
   PREFIX core: <${vivoCore}>  
   SELECT ?existingGrant WHERE { ?role  core:roleIn ?existingGrant . }
 </v:jsonset>
 
 <v:jsonset var="grantTypeUriJson">${vivoOnt}#Grant</v:jsonset>
+
+<v:jsonset var="existingIntervalNodeQuery" >  
+    SELECT ?existingIntervalNode WHERE {
+          ?role <${roleToInterval}> ?existingIntervalNode .
+          ?existingIntervalNode <${type}> <${intervalType}> . }
+</v:jsonset>
+ 
+<v:jsonset var="existingStartNodeQuery" >  
+    SELECT ?existingStartNode WHERE {
+      ?role <${roleToInterval}> ?intervalNode .
+      ?intervalNode <${type}> <${intervalType}> .
+      ?intervalNode <${intervalToStart}> ?existingStartNode . 
+      ?existingStartNode <${type}> <${dateTimeValueType}> .}              
+</v:jsonset>
+
+<v:jsonset var="existingStartDateQuery" >  
+    SELECT ?existingDateStart WHERE {
+     ?role <${roleToInterval}> ?intervalNode .
+     ?intervalNode <${type}> <${intervalType}> .
+     ?intervalNode <${intervalToStart}> ?startNode .
+     ?startNode <${type}> <${dateTimeValueType}> .
+     ?startNode <${dateTimeValue}> ?existingDateStart . }
+</v:jsonset>
+
+<v:jsonset var="existingStartPrecisionQuery" >  
+    SELECT ?existingStartPrecision WHERE {
+      ?role <${roleToInterval}> ?intervalNode .
+      ?intervalNode <${type}> <${intervalType}> .
+      ?intervalNode <${intervalToStart}> ?startNode .
+      ?startNode <${type}> <${dateTimeValueType}> .          
+      ?startNode <${dateTimePrecision}> ?existingStartPrecision . }
+</v:jsonset>
+
+<v:jsonset var="existingEndNodeQuery" >  
+    SELECT ?existingEndNode WHERE {
+      ?role <${roleToInterval}> ?intervalNode .
+      ?intervalNode <${type}> <${intervalType}> .
+      ?intervalNode <${intervalToEnd}> ?existingEndNode . 
+      ?existingEndNode <${type}> <${dateTimeValueType}> .}              
+</v:jsonset>
+
+<v:jsonset var="existingEndDateQuery" >  
+    SELECT ?existingEndDate WHERE {
+     ?role <${roleToInterval}> ?intervalNode .
+     ?intervalNode <${type}> <${intervalType}> .
+     ?intervalNode <${intervalToEnd}> ?endNode .
+     ?endNode <${type}> <${dateTimeValueType}> .
+     ?endNode <${dateTimeValue}> ?existingEndDate . }
+</v:jsonset>
+
+<v:jsonset var="existingEndPrecisionQuery" >  
+    SELECT ?existingEndPrecision WHERE {
+      ?role <${roleToInterval}> ?intervalNode .
+      ?intervalNode <${type}> <${intervalType}> .
+      ?intervalNode <${intervalToEnd}> ?endNode .
+      ?endNode <${type}> <${dateTimeValueType}> .          
+      ?endNode <${dateTimePrecision}> ?existingEndPrecision . }
+</v:jsonset>
+
+
 <c:set var="editjson" scope="request">
 {
     "formUrl" : "${formUrl}",
@@ -191,23 +265,36 @@ PREFIX core: <${vivoCore}>
     "predicate" : ["rolePredicate", "${predicateUriJson}" ],
     "object"    : ["role", "${objectUriJson}", "URI" ],
     
-    "n3required"    : [ "${n3ForGrantRole}", "${startYearAssertion}" ],
+    "n3required"    : [ "${n3ForGrantRole}" ],
     
-    "n3optional"    : [ "${n3ForGrantLabel}", "${n3ForInverse}", "${endYearAssertion}" ],        
+    "n3optional"    : [ "${n3ForGrantLabel}", "${n3ForInverse}", "${n3ForStart}", "${n3ForEnd}" ],        
                                                                                         
     "newResources"  : { "role" : "${defaultNamespace}",
-                        "grant" : "${defaultNamespace}" },
-
+                        "grant" : "${defaultNamespace}",
+                        "intervalNode" : "${defaultNamespace}",
+                        "startNode" : "${defaultNamespace}",
+                        "endNode" : "${defaultNamespace}"  },
     "urisInScope"    : { "roleType" : "${roleType}",
     					 "inverseRolePredicate" : "${inversePredicate}" },
     "literalsInScope": { },
     "urisOnForm"     : [ "grant" ],
-    "literalsOnForm" : [ "grantLabel", "startYear", "endYear", "existingGrantLabel" ],
+    "literalsOnForm" : [ "grantLabel", "existingGrantLabel" ],
     "filesOnForm"    : [ ],
     "sparqlForLiterals" : {  },
     "sparqlForUris" : {   },
-    "sparqlForExistingLiterals" : { "grantLabel":"${grantLabelQuery}" , "startYear":"${startYearQuery}", "endYear":"${endYearQuery}" },
-    "sparqlForExistingUris" : { "grant":"${grantQuery}" },
+    "sparqlForExistingLiterals" : { 
+        "grantLabel":"${grantLabelQuery}" , 
+        "startField.value"   : "${existingStartDateQuery}",
+        "endField.value"     : "${existingEndDateQuery}"  
+    },
+    "sparqlForExistingUris" : { 
+        "grant":"${grantQuery}",
+        "intervalNode"      : "${existingIntervalNodeQuery}",
+        "startNode"         : "${existingStartNodeQuery}",
+        "endNode"           : "${existingEndNodeQuery}",
+        "startField.precision": "${existingStartPrecisionQuery}",
+        "endField.precision"  : "${existingEndPrecisionQuery}" 
+    },
     "fields" : {  
       "grant" : {
          "newResource"      : "false",
@@ -242,27 +329,27 @@ PREFIX core: <${vivoCore}>
          "rangeLang"        : "",         
          "assertions"       : [ ]
       },
-      "startYear" : {
+      "startField" : {
          "newResource"      : "false",
-         "validators"       : [ "nonempty", "datatype:${gYearDatatypeUriJson}" ],
+         "validators"       : [ ],
          "optionsType"      : "UNDEFINED",
          "literalOptions"   : [ ],
          "predicateUri"     : "",
          "objectClassUri"   : "",
-         "rangeDatatypeUri" : "${gYearDatatypeUriJson}",
+         "rangeDatatypeUri" : "",
          "rangeLang"        : "",         
-         "assertions"       : ["${startYearAssertion}"]
+         "assertions"       : [ "${n3ForStart}" ]
       },
-      "endYear" : {
+      "endField" : {
          "newResource"      : "false",
-         "validators"       : [ "datatype:${gYearDatatypeUriJson}" ],
+         "validators"       : [ ],
          "optionsType"      : "UNDEFINED",
          "literalOptions"   : [ ],
          "predicateUri"     : "",
          "objectClassUri"   : "",
-         "rangeDatatypeUri" : "${gYearDatatypeUriJson}",
+         "rangeDatatypeUri" : "",
          "rangeLang"        : "",         
-         "assertions"       : ["${endYearAssertion}"]
+         "assertions"       : ["${n3ForEnd}" ]
       }
   }
 }
@@ -275,9 +362,19 @@ PREFIX core: <${vivoCore}>
     if (editConfig == null) {
         editConfig = new EditConfiguration((String) request.getAttribute("editjson"));     
         EditConfiguration.putConfigInSession(editConfig,session);
-    }   
-        
-    editConfig.addValidator(new StartYearBeforeEndYear("startYear","endYear") );
+        //setup date time edit elements
+        Field startField = editConfig.getField("startField");
+        startField.setEditElement(
+                new DateTimeWithPrecision(startField, 
+                        VitroVocabulary.Precision.YEAR.uri(),
+                        VitroVocabulary.Precision.NONE.uri()));        
+        Field endField = editConfig.getField("endField");
+        endField.setEditElement(
+                new DateTimeWithPrecision(endField, 
+                        VitroVocabulary.Precision.YEAR.uri(),
+                        VitroVocabulary.Precision.NONE.uri()));
+        editConfig.addValidator(new DateTimeIntervalValidation("startField","endField") );
+    }               
         
     Model model = (Model) application.getAttribute("jenaOntModel");
     String objectUri = (String) request.getAttribute("objectUri");
@@ -339,8 +436,8 @@ PREFIX core: <${vivoCore}>
     </div>
 
     <h4>Years of Participation in Grant</h4>
-    <v:input type="text" label="Start Year ${requiredHint} ${yearHint}" id="startYear" size="7"/>   
-    <v:input type="text" label="End Year ${yearHint}" id="endYear" size="7"/> 
+    <v:input id="startField" label="Start Year ${yearHint}" />   
+    <v:input id="endField" label="End Year ${yearHint}" />        
                    
     <p class="submit"><v:input type="submit" id="submit" value="${submitButtonLabel}" cancel="true" /></p>