API v3 and TXP Calendar XML

<rss version="2.0">

<channel>
  <title>A Calendar</title>
  <link>http://www.yourwebsite.com</link>
  <description>A Calendar</description>
<txp:variable name="timeMax"><txp:etc_date date="+7 days" format="%FT%T%z" /></txp:etc_date><txp:variable name="timeMin"><txp:etc_date date="today" format="%FT%T%z" /></txp:etc_date>
<item>
   <title>A Calendar</title>  <link>https://www.googleapis.com/calendar/v3/calendars/GOOGLECALENDARIDHERE/events?singleEvents=true&amp;orderBy=startTime&amp;timeMax=<txp:variable name="timeMax" />&amp;timeMin=<txp:variable name="timeMin" />&amp;fields=items(id%2Csummary%2Cdescription%2Cstart%2Cend%2Clocation%2Corganizer(displayName,email))&amp;key=YOURAPIKEYHERE</link>
</item>
</channel>

</rss>