diff --git a/reference/calendar/functions/jdmonthname.xml b/reference/calendar/functions/jdmonthname.xml
index 0ad13c91b5..b7150952bf 100644
--- a/reference/calendar/functions/jdmonthname.xml
+++ b/reference/calendar/functions/jdmonthname.xml
@@ -30,32 +30,32 @@
      </thead>
      <tbody>
       <row>
-       <entry>0</entry>
+       <entry><constant>CAL_MONTH_GREGORIAN_SHORT</constant></entry>
        <entry>Gregorian - abbreviated</entry>
        <entry>Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec</entry>
       </row>
       <row>
-       <entry>1</entry>
+       <entry><constant>CAL_MONTH_GREGORIAN_LONG</constant></entry>
        <entry>Gregorian</entry>
        <entry>January, February, March, April, May, June, July, August, September, October, November, December</entry>
       </row>
       <row>
-       <entry>2</entry>
+       <entry><constant>CAL_MONTH_JULIAN_SHORT</constant></entry>
        <entry>Julian - abbreviated</entry>
        <entry>Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec</entry>
       </row>
       <row>
-       <entry>3</entry>
+       <entry><constant>CAL_MONTH_JULIAN_LONG</constant></entry>
        <entry>Julian</entry>
        <entry>January, February, March, April, May, June, July, August, September, October, November, December</entry>
       </row>
       <row>
-       <entry>4</entry>
+       <entry><constant>CAL_MONTH_JEWISH</constant></entry>
        <entry>Jewish</entry>
        <entry>Tishri, Heshvan, Kislev, Tevet, Shevat, AdarI, AdarII, Nisan, Iyyar, Sivan, Tammuz, Av, Elul</entry>
       </row>
       <row>
-       <entry>5</entry>
+       <entry><constant>CAL_MONTH_FRENCH</constant></entry>
        <entry>French Republican</entry>
        <entry>Vendemiaire, Brumaire, Frimaire, Nivose, Pluviose, Ventose, Germinal, Floreal, Prairial, Messidor, Thermidor, Fructidor, Extra</entry>
       </row>
@@ -78,10 +78,10 @@
      </listitem>
     </varlistentry>
     <varlistentry>
-     <term><parameter>calendar</parameter></term>
+     <term><parameter>mode</parameter></term>
      <listitem>
       <para>
-       The calendar to take the month name from
+       The calendar mode (see table above).
       </para>
      </listitem>
     </varlistentry>
@@ -92,7 +92,7 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>
-   The month name for the given Julian Day and <parameter>calendar</parameter>.
+   The month name for the given Julian Day and <parameter>mode</parameter>.
   </para>
  </refsect1>