diff --git a/includes/admin/class-wp-job-manager-cpt.php b/includes/admin/class-wp-job-manager-cpt.php
index 0bf0dcb07..b03d0d3e9 100644
--- a/includes/admin/class-wp-job-manager-cpt.php
+++ b/includes/admin/class-wp-job-manager-cpt.php
@@ -446,7 +446,7 @@ public function enter_title_here( $text, $post ) {
 	 */
 	public function post_updated_messages( $messages ) {
 		global $post, $post_ID, $wp_post_types;
-		$wp_date_format = get_option( 'date_format' ) ?: 'F j, Y';
+		$wp_date_format = get_option( 'date_format' ) ?: JOB_MANAGER_DATE_FORMAT_FALLBACK;
 
 		// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- No changes based on input.
 		$revision_title = isset( $_GET['revision'] ) ? wp_post_revision_title( (int) $_GET['revision'], false ) : false;
diff --git a/includes/admin/class-wp-job-manager-writepanels.php b/includes/admin/class-wp-job-manager-writepanels.php
index 7818a4ba4..3fe9d76bc 100644
--- a/includes/admin/class-wp-job-manager-writepanels.php
+++ b/includes/admin/class-wp-job-manager-writepanels.php
@@ -585,7 +585,7 @@ public function job_listing_data( $post ) {
 		global $post, $thepostid, $wp_post_types;
 
 		$thepostid      = $post->ID;
-		$wp_date_format = get_option( 'date_format' ) ?: 'F j, Y';
+		$wp_date_format = get_option( 'date_format' ) ?: JOB_MANAGER_DATE_FORMAT_FALLBACK;
 		echo '<div class="wp_job_manager_meta_data">';
 
 		wp_nonce_field( 'save_meta_data', 'job_manager_nonce' );
diff --git a/includes/class-wp-job-manager-email-notifications.php b/includes/class-wp-job-manager-email-notifications.php
index 0fee856c4..2170e2a2f 100644
--- a/includes/class-wp-job-manager-email-notifications.php
+++ b/includes/class-wp-job-manager-email-notifications.php
@@ -312,7 +312,7 @@ private static function get_job_detail_fields( WP_Post $job, $sent_to_admin, $pl
 		}
 
 		$job_expires    = WP_Job_Manager_Post_Types::instance()->get_job_expiration( $job );
-		$wp_date_format = get_option( 'date_format' ) ?: 'F j, Y';
+		$wp_date_format = get_option( 'date_format' ) ?: JOB_MANAGER_DATE_FORMAT_FALLBACK;
 		if ( ! empty( $job_expires ) ) {
 			$job_expires_str       = wp_date( $wp_date_format, $job_expires->getTimestamp() );
 			$fields['job_expires'] = [
diff --git a/wp-job-manager-template.php b/wp-job-manager-template.php
index 3b29bf95d..e17255937 100644
--- a/wp-job-manager-template.php
+++ b/wp-job-manager-template.php
@@ -759,7 +759,7 @@ function wpjm_get_registration_fields() {
  */
 function the_job_publish_date( $post = null ) {
 	$date_format    = get_option( 'job_manager_date_format' );
-	$wp_date_format = get_option( 'date_format' ) ?: 'F j, Y';
+	$wp_date_format = get_option( 'date_format' ) ?: JOB_MANAGER_DATE_FORMAT_FALLBACK;
 
 	if ( 'default' === $date_format ) {
 		$display_date = esc_html__( 'Posted on ', 'wp-job-manager' ) . wp_date( $wp_date_format, get_post_timestamp( $post ) );
@@ -788,7 +788,7 @@ function the_job_publish_date( $post = null ) {
  */
 function get_the_job_publish_date( $post = null ) {
 	$date_format    = get_option( 'job_manager_date_format' );
-	$wp_date_format = get_option( 'date_format' ) ?: 'F j, Y';
+	$wp_date_format = get_option( 'date_format' ) ?: JOB_MANAGER_DATE_FORMAT_FALLBACK;
 
 	if ( 'default' === $date_format ) {
 		return wp_date( $wp_date_format, get_post_datetime()->getTimestamp() );
diff --git a/wp-job-manager.php b/wp-job-manager.php
index fbb25f095..fc91ac7dd 100644
--- a/wp-job-manager.php
+++ b/wp-job-manager.php
@@ -25,6 +25,7 @@
 define( 'JOB_MANAGER_PLUGIN_DIR', untrailingslashit( plugin_dir_path( __FILE__ ) ) );
 define( 'JOB_MANAGER_PLUGIN_URL', untrailingslashit( plugins_url( basename( plugin_dir_path( __FILE__ ) ), basename( __FILE__ ) ) ) );
 define( 'JOB_MANAGER_PLUGIN_BASENAME', plugin_basename( __FILE__ ) );
+define( 'JOB_MANAGER_DATE_FORMAT_FALLBACK', 'F j, Y' );
 
 require_once dirname( __FILE__ ) . '/wp-job-manager-autoload.php';
 WP_Job_Manager_Autoload::init();