diff --git a/reference/calendar/functions/easter-date.xml b/reference/calendar/functions/easter-date.xml
index ed73cc6d51..a9acb66ada 100644
--- a/reference/calendar/functions/easter-date.xml
+++ b/reference/calendar/functions/easter-date.xml
@@ -37,10 +37,6 @@
    September 1752) two correction factors are added to make the
    cycle more accurate.
   </para>
-  <para>
-   (The code is based on a C program by Simon Kershaw,
-   &lt;webmaster at ely.anglican dot org&gt;)
-  </para>
  </refsect1>
 
  <refsect1 role="parameters">
diff --git a/reference/calendar/functions/easter-days.xml b/reference/calendar/functions/easter-days.xml
index d144a0560d..e96713bb4f 100644
--- a/reference/calendar/functions/easter-days.xml
+++ b/reference/calendar/functions/easter-days.xml
@@ -39,10 +39,6 @@
    September 1752) two correction factors are added to make the
    cycle more accurate.
   </para>
-  <para>
-   (The code is based on a C program by Simon Kershaw,
-   &lt;webmaster at ely.anglican dot org&gt;)
-  </para>
  </refsect1>
 
  <refsect1 role="parameters">