diff --git a/calendar/resources/content/datetimepickers/datetimepickers.xml b/calendar/resources/content/datetimepickers/datetimepickers.xml
index a64e96959e9e..e5ff780f3b66 100644
--- a/calendar/resources/content/datetimepickers/datetimepickers.xml
+++ b/calendar/resources/content/datetimepickers/datetimepickers.xml
@@ -663,7 +663,7 @@
                 <timepicker-minute class="time-picker-one-minute-class"   value="55"
                                    anonid="time-picker-one-minute-box-55" label=":55"/>
                 <timepicker-minute class="time-picker-one-minute-class"   value="56"
-                                   anonid="time-picker-one-minute-box-56" label=":57"/>
+                                   anonid="time-picker-one-minute-box-56" label=":56"/>
                 <timepicker-minute class="time-picker-one-minute-class"   value="57"
                                    anonid="time-picker-one-minute-box-57" label=":57"/>
                 <timepicker-minute class="time-picker-one-minute-class"   value="58"