Line 1208 there is a typo witch case problems with the var $month.link_next_month on line 1208 is: 'link_next_month' => sprintf('%s?%s=%s&%s=%s&%s=%s&%s=%s', should be: 'link_next_month' => sprintf('%s?%s', then the link for the next month works in the frontendtemplate correct! best regards mr-fan