e> will be set to the value of the
        day and <code class="literal">mdy[2]</code> will contain the year.
       </p><p>
        The function always returns 0 at the moment.
       </p><p>
        Internally the function uses the <a class="xref" href="ecpg-pgtypes.html#PGTYPESDATEJULMDY"><code class="function">PGTYPESdate_julmdy</code></a>
        function.
       </p></dd><dt id="ECPG-INFORMIX-FUNCTIONS-RDEFMTDATE"><span class="term"><code class="function">rdefmtdate</code></span> <a href="#ECPG-INFORM