bsk_pdfm_filter_date_filter_text_weekday
Default option null text for weekday dropdown is Day, you may use this filter to update it.
Example
/** * Change the default option null text of weekday dropdown in date filter * @return new option null text */ add_filter( "bsk_pdfm_filter_date_filter_text_weekday", "change_date_filter_weekday_text" ); function change_date_filter_weekday_text() { return 'Reset Weekday to filter PDFs'; }