diff --git a/src/main/java/no/bioforsk/vips/model/roughagenutritionmodel/RoughageNutritionModelImpl.java b/src/main/java/no/bioforsk/vips/model/roughagenutritionmodel/RoughageNutritionModelImpl.java
index 6a9cf83b14e5c6d6ffb554f2410089c3b0c807ac..0e20187c5f37ec6fbbd23a21946d6cb09844d85c 100644
--- a/src/main/java/no/bioforsk/vips/model/roughagenutritionmodel/RoughageNutritionModelImpl.java
+++ b/src/main/java/no/bioforsk/vips/model/roughagenutritionmodel/RoughageNutritionModelImpl.java
@@ -1675,6 +1675,7 @@ public class RoughageNutritionModelImpl implements CostFunction{
         
 
         SimpleDateFormat format = new SimpleDateFormat("dd.MM.yyyy");
+        format.setTimeZone(timeZone);
 
         // Dato for første- og andreslått må være innenfor klimadataenes spenn
         if(this.datoFoersteSlaatt == null)