Index: trunk/src/org/openstreetmap/josm/gui/animation/AnimationExtensionManager.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/animation/AnimationExtensionManager.java	(revision 17718)
+++ trunk/src/org/openstreetmap/josm/gui/animation/AnimationExtensionManager.java	(revision 17719)
@@ -2,7 +2,5 @@
 package org.openstreetmap.josm.gui.animation;
 
-import java.util.Calendar;
-import java.util.Date;
-import java.util.GregorianCalendar;
+import java.time.LocalDate;
 
 import org.openstreetmap.josm.data.preferences.BooleanProperty;
@@ -45,7 +43,5 @@
 
     private static boolean isChristmas() {
-        Calendar c = new GregorianCalendar();
-        c.setTime(new Date());
-        return c.get(Calendar.DAY_OF_YEAR) > 350;
+        return LocalDate.now().getDayOfYear() > 350;
     }
 }