diff --git a/reference/intl/intlcalendar.xml b/reference/intl/intlcalendar.xml
index 3e1151d31c..26ac37d27a 100644
--- a/reference/intl/intlcalendar.xml
+++ b/reference/intl/intlcalendar.xml
@@ -310,8 +310,8 @@
        Calendar field for the month. The month sequence is zero-based, so
        Janurary (here used to signify the first month of the calendar; this
        may be called another name, such as Muharram in the Islamic calendar)
-       is represented by <literal>1</literal>, February by
-       <literal>2</literal>, …, December by <literal>11</literal> and, for
+       is represented by <literal>0</literal>, February by
+       <literal>1</literal>, …, December by <literal>11</literal> and, for
        calendars that have it, the 13th or leap month by
        <literal>12</literal>.
       </para>