function dateDiff ($d1, $d2, $d3) {
    // Return the number of days between the two dates:

        /*days from now till the start of the event*/
        $diff_start_event = round((strtotime($d2)-$d1)/86400);  /*86400 is 24h (1 day)  in secconds*/

        /*days from now till the end of the event*/
        $diff_end_event = round((strtotime($d3)-$d1)/86400);  /*86400 is 24h (1 day)  in secconds*/
        $date_format = get_option( 'date_format' );
        //date()

        if($diff_start_event > 0 && $d2 != '' && strtotime($d2) > $d1) {  /*future*/
            if (abs($diff_start_event) == 1) {
                return abs($diff_start_event) . ' ' . __('day left', 'cosmotheme'); //one day, singular
            } else {
                return abs($diff_start_event) . ' ' . __('days left', 'cosmotheme'); //more than one day, plural
            }

        }else if( $diff_start_event <= 0 && $d2 != '' && $diff_end_event >= 0 && $d3 != ''){
            return __('Ongoing','cosmotheme');
        }elseif ($diff_start_event < 0 && $d2 != '' && ( ($diff_end_event < 0 && $d3 != '') || $d3 == '' ) ) {
            return __('Expired','cosmotheme');
        }else if($d2 == '' && $d3 != ''){

            if($diff_end_event > 0){
                if ( abs($diff_end_event) == 1 ) {
                    return abs($diff_end_event) . ' ' . __('day left', 'cosmotheme'); //one day, singular
                } else {
                    return abs($diff_end_event) . ' ' . __('days left', 'cosmotheme'); //more than one day, plural
                }


            }elseif($diff_end_event == 0){
                return __('Ongoing','cosmotheme');
            }else{
                return __('Expired','cosmotheme');
            }
        }


    }  // end function dateDiff