In analytics we are interested in retrieving section end dates and update them, we are currently doing it using get_section_dates and update_end_date, which is specific to format_weeks; this is not ideal because we are using the method_exists trick, an API should communicate with other APIs with methods available at base class level and a format_months extending format_base should also work in analytics (although if that format would exist it would probably extend format_weeks).This case is a bit on the border because not all formats have sections.