diff --git a/pdb-plotting/src/main/java/org/lucares/pdb/plot/api/Interval.java b/pdb-plotting/src/main/java/org/lucares/pdb/plot/api/Interval.java
index ba83834..f4dffa9 100644
--- a/pdb-plotting/src/main/java/org/lucares/pdb/plot/api/Interval.java
+++ b/pdb-plotting/src/main/java/org/lucares/pdb/plot/api/Interval.java
@@ -62,9 +62,9 @@ public class Interval {
     private String toDateFormatForBucketer(final IntervalTimeUnit intervalTimeUnit) {
         switch (intervalTimeUnit) {
         case MINUTE:
-            return "yyyy-MM-dd HH:mm";
+            return "yyyy-MM-dd'\\n'HH:mm";
         case HOUR:
-            return "yyyy-MM-dd HH";
+            return "yyyy-MM-dd'\\n'HH:00";
         case DAY:
             return "yyyy-MM-dd";
         case WEEK: