Hi everyone.
I've read the tutorial about creating new site reports here and I've created the "All Pages" site report example.
I want to know is if it's possible to create custom site reports like "Pages edited in the last 2 weeks" but, instead of 2 weeks, I would like to have something like "Pages edited in the last 3 weeks" or "Pages edited in the last month".
Best regards.

You can just copy the Pages edited in the last 2 weeks reports code and change the date or something. Assuming you have read the Tutorial and understand how to write your own report class etc your records() method would be

// get latest 3 weeks (21 days) of edits
function records() {
return DataObject::get("SiteTree", "`SiteTree`.LastEdited > NOW() - INTERVAL 21 DAY", "`SiteTree`.`LastEdited` DESC");
	}

Thanks willr.