=== modified file 'dhis-2/dhis-api/src/main/java/org/hisp/dhis/dataelement/DataElement.java'
--- dhis-2/dhis-api/src/main/java/org/hisp/dhis/dataelement/DataElement.java	2014-12-19 15:47:38 +0000
+++ dhis-2/dhis-api/src/main/java/org/hisp/dhis/dataelement/DataElement.java	2014-12-22 21:47:45 +0000
@@ -361,6 +361,24 @@
     }
 
     /**
+     * Indicates whether collecting data for future periods should be allowed for
+     * this data element.
+     * @return true if all the associated data sets allow future periods, false otherwise.
+     */
+    public boolean isAllowFuturePeriods()
+    {
+        for ( DataSet dataSet : dataSets )
+        {
+            if( dataSet != null && !dataSet.isAllowFuturePeriods() )
+            {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    /**
      * Returns the frequency order for the PeriodType of this DataElement. If no
      * PeriodType exists, 0 is returned.
      */

=== modified file 'dhis-2/dhis-api/src/main/java/org/hisp/dhis/period/Period.java'
--- dhis-2/dhis-api/src/main/java/org/hisp/dhis/period/Period.java	2014-11-11 11:46:59 +0000
+++ dhis-2/dhis-api/src/main/java/org/hisp/dhis/period/Period.java	2014-12-22 21:47:45 +0000
@@ -276,6 +276,15 @@
         return true;
     }
 
+    /**
+     * Determines whether this is a future period in relation to the current time.
+     * @return true if this period ends in the future, false otherwise (the period has ended).
+     */
+    public boolean isFuture()
+    {
+        return getEndDate().after( new Date() );
+    }
+
     // -------------------------------------------------------------------------
     // hashCode, equals and toString
     // -------------------------------------------------------------------------

=== modified file 'dhis-2/dhis-web/dhis-web-api/src/main/java/org/hisp/dhis/webapi/controller/DataValueController.java'
--- dhis-2/dhis-web/dhis-web-api/src/main/java/org/hisp/dhis/webapi/controller/DataValueController.java	2014-11-11 12:51:06 +0000
+++ dhis-2/dhis-web/dhis-web-api/src/main/java/org/hisp/dhis/webapi/controller/DataValueController.java	2014-12-22 21:47:45 +0000
@@ -33,6 +33,7 @@
 import org.hisp.dhis.dataelement.DataElementCategoryOptionCombo;
 import org.hisp.dhis.dataelement.DataElementCategoryService;
 import org.hisp.dhis.dataelement.DataElementService;
+import org.hisp.dhis.dataset.DataSet;
 import org.hisp.dhis.dataset.DataSetService;
 import org.hisp.dhis.datavalue.DataValue;
 import org.hisp.dhis.datavalue.DataValueService;
@@ -66,6 +67,10 @@
 {
     public static final String RESOURCE_PATH = "/dataValues";
 
+    // ---------------------------------------------------------------------
+    // Dependencies
+    // ---------------------------------------------------------------------
+
     @Autowired
     private CurrentUserService currentUserService;
 
@@ -87,6 +92,10 @@
     @Autowired
     private InputUtils inputUtils;
 
+    // ---------------------------------------------------------------------
+    // POST
+    // ---------------------------------------------------------------------
+
     @PreAuthorize( "hasRole('ALL') or hasRole('F_DATAVALUE_ADD')" )
     @RequestMapping( method = RequestMethod.POST, produces = "text/plain" )
     public void saveDataValue(
@@ -177,6 +186,17 @@
         }
 
         // ---------------------------------------------------------------------
+        // Future period constraint check
+        // ---------------------------------------------------------------------
+
+        if ( period.isFuture() && !dataElement.isAllowFuturePeriods() )
+        {
+            ContextUtils.conflictResponse( response, "Cannot save data value for future period. " +
+                "One or more data sets for data element " + de + " does not allow future periods." );
+            return;
+        }
+
+        // ---------------------------------------------------------------------
         // Locking validation
         // ---------------------------------------------------------------------
 
@@ -240,6 +260,10 @@
         }
     }
 
+    // ---------------------------------------------------------------------
+    // DELETE
+    // ---------------------------------------------------------------------
+
     @PreAuthorize( "hasRole('ALL') or hasRole('F_DATAVALUE_DELETE')" )
     @RequestMapping( method = RequestMethod.DELETE, produces = "text/plain" )
     public void deleteDataValue(
@@ -335,6 +359,10 @@
         dataValueService.deleteDataValue( dataValue );
     }
 
+    // ---------------------------------------------------------------------
+    // GET
+    // ---------------------------------------------------------------------
+
     @RequestMapping( method = RequestMethod.GET )
     public String getDataValue(
         @RequestParam String de,