diff --git a/persianmaterialdatetimepicker/src/main/java/com/mohamadamin/persianmaterialdatetimepicker/utils/PersianCalendar.java b/persianmaterialdatetimepicker/src/main/java/com/mohamadamin/persianmaterialdatetimepicker/utils/PersianCalendar.java
index 830de22..3045ecd 100644
--- a/persianmaterialdatetimepicker/src/main/java/com/mohamadamin/persianmaterialdatetimepicker/utils/PersianCalendar.java
+++ b/persianmaterialdatetimepicker/src/main/java/com/mohamadamin/persianmaterialdatetimepicker/utils/PersianCalendar.java
@@ -163,7 +163,7 @@ public String getPersianShortDate() {
   }
 
   private String formatToMilitary(int i) {
-    return (i < 9) ? "0" + i : String.valueOf(i);
+    return (i <= 9) ? "0" + i : String.valueOf(i);
   }
 
   /**
@@ -433,4 +433,4 @@ public String toString() {
       return getYear() + "/" + getMonth() + "/" + getDay();
     }
   }
-}
\ No newline at end of file
+}