Add a custom start date field displayed to the single job listing

functions.php

/** added to functions.php to create Start Date field **/
 
add_filter( 'submit_job_form_fields', 'frontend_add_start_field' );
 
function frontend_add_start_field( $fields ) {
  $fields['job']['job_start'] = array(
    'label'       => __( 'Start', 'job_manager' ),
    'type'        => 'text',
    'required'    => true,
    'placeholder' => 'eg March 2017',
    'priority'    => 8
  );
  return $fields;
}
 
add_filter( 'job_manager_job_listing_data_fields', 'admin_add_start_field' );
 
function admin_add_start_field( $fields ) {
  $fields['_job_start'] = array(
    'label'       => __( 'Start', 'job_manager' ),
    'type'        => 'text',
    'placeholder' => 'March 2017',
    'description' => ''
  );
  return $fields;
}
/** end **/


function display_start_date() {
  global $post;
  $start_date = get_post_meta( $post->ID, '_job_start', true );

if ($start_date) {
	echo  '<li class="location" itemprop="jobLocation">' . $start_date . '</li>';
	}
}
echo '<li>' . __( 'Start:' ) . esc_html( $start_date ) . '</li>';
add_action( 'single_job_listing_meta_end', 'display_start_date' );