<entry>
    <title>$title$</title>
    <link href="$root$$url$" />
    <id>$root$$url$</id>
    <updated>$timestamp$</updated>
    <summary type="html"><![CDATA[$description$]]></summary>
</entry>

<entry>
    <title>$title$</title>
    <link href="$root$$url$" />
    <id>$root$$url$</id>
    <published>$timestamp$</published>
    <summary type="html"><![CDATA[$description$]]></summary>
</entry>

Put post publication timestamp into atom:published field rather than atom:updated.
Put post publication timestamp into atom:published field rather than atom:updated.
