diff --git a/vcell-api/src/main/java/org/vcell/rest/server/BiomodelsServerResource.java b/vcell-api/src/main/java/org/vcell/rest/server/BiomodelsServerResource.java
index 92a73ecc78..0af6897f57 100644
--- a/vcell-api/src/main/java/org/vcell/rest/server/BiomodelsServerResource.java
+++ b/vcell-api/src/main/java/org/vcell/rest/server/BiomodelsServerResource.java
@@ -1,6 +1,7 @@
 package org.vcell.rest.server;
 
 import java.sql.SQLException;
+import java.text.ParseException;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.HashMap;
@@ -103,7 +104,14 @@ public BiomodelRepresentation[] get_json() {
 		VCellApiApplication application = ((VCellApiApplication)getApplication());
 		User vcellUser = application.getVCellUser(getChallengeResponse(),AuthenticationPolicy.prohibitInvalidCredentials);
 		
-        return getBiomodelRepresentations(vcellUser);
+		BiomodelRepresentation[] bmReps = new BiomodelRepresentation[0];
+		try {
+			getBiomodelRepresentations(vcellUser);
+		} catch (ParseException e) {
+			// TODO Auto-generated catch block
+			e.printStackTrace();
+		}
+        return bmReps;
     }
     
 	@Override
@@ -111,7 +119,15 @@ public Representation get_html() {
 		VCellApiApplication application = ((VCellApiApplication)getApplication());
 		User vcellUser = application.getVCellUser(getChallengeResponse(),AuthenticationPolicy.ignoreInvalidCredentials);
 		
-		BiomodelRepresentation[] biomodels = getBiomodelRepresentations(vcellUser);
+		BiomodelRepresentation[] biomodels = new BiomodelRepresentation[0];
+		boolean bFormatErr = false;
+		try {
+			biomodels = getBiomodelRepresentations(vcellUser);
+		} catch (ParseException e) {
+			// TODO Auto-generated catch block
+			e.printStackTrace();
+			bFormatErr = true;
+		}
 		Map<String,Object> dataModel = new HashMap<String,Object>();
 		
 		dataModel.put("loginurl", "/"+VCellApiApplication.LOGINFORM);  // +"?"+VCellApiApplication.REDIRECTURL_FORMNAME+"="+getRequest().getResourceRef().toUrl());
@@ -123,8 +139,8 @@ public Representation get_html() {
 		dataModel.put("userId", getAttribute(PARAM_USER));
 		dataModel.put("bmName", getQueryValue(PARAM_BM_NAME));
 		dataModel.put("bmId", getQueryValue(PARAM_BM_ID));
-		dataModel.put("savedLow", getLongQueryValue(PARAM_SAVED_LOW));
-		dataModel.put("savedHigh", getLongQueryValue(PARAM_SAVED_HIGH));
+		dataModel.put("savedLow", (bFormatErr?"Error":getQueryValue(PARAM_SAVED_LOW)));
+		dataModel.put("savedHigh", (bFormatErr?"Error":getQueryValue(PARAM_SAVED_HIGH)));
 		dataModel.put("ownerName", getQueryValue(PARAM_BM_OWNER));
 		dataModel.put("category", getQueryValue(PARAM_CATEGORY));
 		dataModel.put("orderBy", getQueryValue(PARAM_ORDERBY));
@@ -155,7 +171,7 @@ public Representation get_html() {
 	}
 
 
-	private BiomodelRepresentation[] getBiomodelRepresentations(User vcellUser) {
+	private BiomodelRepresentation[] getBiomodelRepresentations(User vcellUser) throws ParseException{
 //		if (!application.authenticate(getRequest(), getResponse())){
 //			// not authenticated
 //			return new SimulationTaskRepresentation[0];
diff --git a/vcell-api/src/main/java/org/vcell/rest/server/RestDatabaseService.java b/vcell-api/src/main/java/org/vcell/rest/server/RestDatabaseService.java
index 8d05aa39f5..cecd77121d 100644
--- a/vcell-api/src/main/java/org/vcell/rest/server/RestDatabaseService.java
+++ b/vcell-api/src/main/java/org/vcell/rest/server/RestDatabaseService.java
@@ -2,10 +2,13 @@
 
 import java.beans.PropertyVetoException;
 import java.sql.SQLException;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
 import java.util.ArrayList;
 import java.util.Date;
 import java.util.HashMap;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Random;
 import java.util.TreeMap;
@@ -281,14 +284,14 @@ public DataSetTimeSeries getDataSetTimeSeries(SimDataValuesServerResource resour
 		}
 	}
 
-	public BioModelRep[] query(BiomodelsServerResource resource, User vcellUser) throws SQLException, DataAccessException {			
+	public BioModelRep[] query(BiomodelsServerResource resource, User vcellUser) throws SQLException, DataAccessException, ParseException {			
 		if (vcellUser==null){
 			vcellUser = VCellApiApplication.DUMMY_USER;
 		}
 		String bioModelName = resource.getQueryValue(BiomodelsServerResource.PARAM_BM_NAME);
 		Long bioModelID = resource.getLongQueryValue(BiomodelsServerResource.PARAM_BM_ID);
-		Long savedLow = resource.getLongQueryValue(BiomodelsServerResource.PARAM_SAVED_LOW);
-		Long savedHigh = resource.getLongQueryValue(BiomodelsServerResource.PARAM_SAVED_HIGH);
+		String savedLow = resource.getQueryValue(BiomodelsServerResource.PARAM_SAVED_LOW);
+		String savedHigh = resource.getQueryValue(BiomodelsServerResource.PARAM_SAVED_HIGH);
 		Long startRowParam = resource.getLongQueryValue(BiomodelsServerResource.PARAM_START_ROW);
 		Long maxRowsParam = resource.getLongQueryValue(BiomodelsServerResource.PARAM_MAX_ROWS);
 		String categoryParam = resource.getQueryValue(BiomodelsServerResource.PARAM_CATEGORY); // it is ok if the category is null;
@@ -304,13 +307,16 @@ public BioModelRep[] query(BiomodelsServerResource resource, User vcellUser) thr
 		}
 		ArrayList<String> conditions = new ArrayList<String>();
 		
-		java.text.SimpleDateFormat df = new java.text.SimpleDateFormat("MM/dd/yyyy HH:mm:ss", java.util.Locale.US);
+		//java.text.SimpleDateFormat df = new java.text.SimpleDateFormat("MM/dd/yyyy HH:mm:ss", java.util.Locale.US);
+		SimpleDateFormat df = new SimpleDateFormat("yyyy/MM/dd",Locale.US);
 		
-		if (savedLow != null){
-			conditions.add("(" + BioModelTable.table.versionDate.getQualifiedColName() + " >= to_date('" + df.format(new Date(savedLow)) + "', 'mm/dd/yyyy HH24:MI:SS'))");		
+		if (savedLow != null && savedLow.length()>0){
+			df.parse(savedLow);
+			conditions.add("(" + BioModelTable.table.versionDate.getQualifiedColName() + " >= to_date('" + savedLow + "', 'yyyy/mm/dd'))");		
 		}
-		if (savedHigh != null){
-			conditions.add("(" + BioModelTable.table.versionDate.getQualifiedColName() + " <= to_date('" + df.format(new Date(savedHigh)) + "', 'mm/dd/yyyy HH24:MI:SS'))");		
+		if (savedHigh != null && savedHigh.length()>0){
+			df.parse(savedHigh);
+			conditions.add("(" + BioModelTable.table.versionDate.getQualifiedColName() + " <= to_date('" + savedHigh + "', 'yyyy/mm/dd'))");		
 		}
 		if (bioModelName != null && bioModelName.trim().length()>0){
 			String pattern = bioModelName.trim();
diff --git a/vcell-api/src/main/resources/biomodels.ftl b/vcell-api/src/main/resources/biomodels.ftl
index 1c0d22d574..6b1617de66 100644
--- a/vcell-api/src/main/resources/biomodels.ftl
+++ b/vcell-api/src/main/resources/biomodels.ftl
@@ -21,8 +21,8 @@
 						<input type='radio' name='category' value='education' <#if category?? && category == "education">checked=on</#if>>educational</input>
 						</td></tr>
 	<tr><td>Owner</td><td><input type='text' name='owner' value='${ownerName!""}'/></td></tr>
-	<tr><td>Begin Time</td><td><input type='text' name='savedLow' value='${savedLow!""}'/></td></tr>
-	<tr><td>End Timestamp</td><td><input type='text' name='savedHigh' value='${savedHigh!""}'/></td></tr>
+	<tr><td>Begin Date (yyyy/mm/dd)</td><td><input type='text' name='savedLow' value='${savedLow!""}'/></td></tr>
+	<tr><td>End   Date (yyyy/mm/dd)</td><td><input type='text' name='savedHigh' value='${savedHigh!""}'/></td></tr>
 	<tr><td>start row</td><td><input type='text' name='startRow' value='${startRow}'/></td></tr>
 	<tr><td>max num rows</td><td><input type='text' name='maxRows' value='${maxRows}'/></td></tr>
 	<tr><td>Order By</td><td>