Function for custom display of Timely All-in-One-Calendar long date

gistfile1.php

/* ========================================================================================
 *
 * function for custom date range display of Timely ai1ec events
 *
 * @param $event - you must pass Timely's $event object to this function
 * @param $date_format - pass a PHP valid date format for Month & Day (not year!)
 * @param $time_format - pass a PHP valid time format, pass FALSE to omit time from output
 * @param $echo - defaults to true, in order to return pass FALSE for $echo parameter

 * ======================================================================================== */
 
if ( in_array( 'all-in-one-event-calendar/all-in-one-event-calendar.php', apply_filters( 'active_plugins', get_option( 'active_plugins' ) ) ) ) {

    function timely_event_long_date(
        $event = '',
        $date_format = 'M d',
        $time_format = 'g:i a',
        $echo = true
      ){
      global $post,
             $ai1ec_calendar_helper,
             $ai1ec_events_helper;

        if ( empty($event) ) :
          if($echo): echo 'Date parameter is undefined.'; else: return 'Date parameter is undefined.'; endif;
          exit;
        endif;

        $start = date( $ai1ec_events_helper->gmt_to_local( $event->start ) );
        $start_month = date( 'm', $start );
        $start_day = date( 'd', $start );
        $start_year = date( 'Y', $start );
        $start_hour = date( 'G', $start );
        $start_min = date( 'i', $start );
        $end = date( $ai1ec_events_helper->gmt_to_local( $event->end ) );
        $end_month = date( 'm', $end );
        $end_day = date( 'd', $end );
        $end_year = date( 'Y', $end );
        $end_hour = date( 'G', $end );
        $end_min = date( 'i', $end);

        // error_log(print_r($event,true));

        if ( $time_format != false ):
          if( $start_hour == $end_hour && $start_min == $end_min ):
            $time = ' | ' . date( $time_format, $start );
          else:
            $time = ' | ' . date( $time_format, $start ) . ' - ' . date( $time_format, $end );
          endif;
        endif;

        if($start <= $end):
            if($start == $end):
                //Month Day, Year
                $date =  date( $date_format . ', Y ', $start) . $time;
            else:
                if($start_year == $end_year):
                    if($start_month == $end_month):
                        if($start_day == $end_day):
                          //Month Day - Day, Year
                          $date = date( $date_format . ', Y', $start ) . $time;
                        else:
                          //Month Day - Day, Year
                          $date = date( $date_format, $start ). ' - ' . date( 'j, Y', $end ) . $time;
                        endif;
                    else:
                        //Month Day - Month Day, Year
                        $date =  date( $date_format, $start ) . ' - ' . date( $date_format ,$end ) . ', ' . date( 'Y', $end ) . $time;
                    endif;
                else:
                    //Month Day, Year - Month Day, Year
                    $date =  date( $date_format . ', Y', $start ) . ' - ' . date( $date_format . ', Y', $end ) . $time;
                endif;
            endif;
        endif;

        // Add all-day label.
        if ( $event->allday ) {
          $date .=
            ' <span class="ai1ec-allday-badge">' .
            __( 'all-day', AI1EC_PLUGIN_NAME ) .
            '</span>';
        }

        if($echo): echo $date; else: return $date; endif;
    }

} // end wrapper to check if all-in-one-event-calendar is active