Masterpress 1.3.6 is a compatibility release. It resolves an edge case with shared fieldsets not working for MySQL 8 when the fieldset is limited to more than 1 post type or taxonomy or excluding any post types or taxonomies.
Returns the last modified time of a file as a date value or formatted date string, which is accessed via PHP’s filemtime function. This is likely to be the most useful of all of the date methods in this class, and the most reliably reported.
Note: the format string uses the same format as the PHP date function, with the same token extensions supported by the date_format.