diff --git a/k9mail/src/main/java/com/fsck/k9/K9.java b/k9mail/src/main/java/com/fsck/k9/K9.java
index 5869198251f..2185c1e5f04 100644
--- a/k9mail/src/main/java/com/fsck/k9/K9.java
+++ b/k9mail/src/main/java/com/fsck/k9/K9.java
@@ -1005,7 +1005,7 @@ public static boolean isQuietTime() {
         Integer endHour = Integer.parseInt(mQuietTimeEnds.split(":")[0]);
         Integer endMinute = Integer.parseInt(mQuietTimeEnds.split(":")[1]);
 
-        Integer now = (gregorianCalendar.get(Calendar.HOUR) * 60) + gregorianCalendar.get(Calendar.MINUTE);
+        Integer now = (gregorianCalendar.get(Calendar.HOUR_OF_DAY) * 60) + gregorianCalendar.get(Calendar.MINUTE);
         Integer quietStarts = startHour * 60 + startMinute;
         Integer quietEnds =  endHour * 60 + endMinute;