When you edit the mambot settings the description gives you the information:
Displays link to event report after event expiry. Replaces {eventreport}link text|url|day|month|year{/eventreport} with a link "url" using the given "link text" but only after "date to enable".
e.g. Place the following in your event description:
{eventreport}Event Report on BBC|http://news.bbc.co.uk|12|02|2007{/eventreport}
Before 12 Feb 2007 the event detail will show no information about the event report.
After 12 Feb 2007 the event detail for this event will then include a link like Event Report on BBC.
In practice you would of course use a link to a URL on your Joomla site.
