diff --git a/src/main/webapp/map_applications/fireblight/js/map.js b/src/main/webapp/map_applications/fireblight/js/map.js
index 451244d0b1c1e5826197e8f714b6fb8b95ae8e8f..b8983e57c100549b34baf05648e238b7045ea6b2 100755
--- a/src/main/webapp/map_applications/fireblight/js/map.js
+++ b/src/main/webapp/map_applications/fireblight/js/map.js
@@ -353,10 +353,15 @@ var storeFeature = function(featureId)
     var tiltak = document.getElementById("tiltak").options[document.getElementById("tiltak").options.selectedIndex].value;
     var observationText = document.getElementById("beskrivelse").value;
     var observationHeading = "Registrering av pærebrann";
-    var timeOfObservation = moment(document.getElementById("dato").value + "+0200","DD.MM.YYYYZ").valueOf();
+    var timeOfObservation = moment(document.getElementById("dato").value + "+0200","DD.MM.YYYYZ");
+    if(timeOfObservation.year() < 2000)
+    {
+        alert("Feil dato (før år 2000). Datoformat er DD.MM.ÅÅÅÅ");
+        return;
+    }
     
     feature.setProperties({
-       timeOfObservation: timeOfObservation,
+       timeOfObservation: timeOfObservation.valueOf(),
        cropOrganism: cropOrganism,
        organism: paerebrann,
        observationHeading: observationHeading,