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