Display the Last Updated Date

$u_time          = get_the_time( 'U' );

$u_modified_time = get_the_modified_time( 'U' );

// Only display modified date if 24hrs have passed since the post was published.

if ( $u_modified_time >= $u_time + 86400 ) {

	$updated_date = get_the_modified_time( 'F jS, Y' );

	$updated_time = get_the_modified_time( 'h:i a' );

	$updated = '<p class="last-updated">';

	$updated .= sprintf(

	// Translators: Placeholders get replaced with the date and time when the post was modified.

		esc_html__( 'Last updated on %1$s at %2$s' ),

		$updated_date,

		$updated_time

	);

	$updated .= '</p>';

	echo wp_kses_post( $updated );

}