Restore day-only format for 2nd date in a date range in the same month

gistfile1.php

<?php

add_filter( 'tribe_format_second_date_in_range', 'tribe_restore_no_month_format', 10, 2 );
function tribe_restore_no_month_format( $format, $event ) {
	if ( tribe_event_is_all_day( $event ) && tribe_get_end_date( $event, false, 'm' ) === tribe_get_start_date( $event, false, 'm' ) && tribe_get_end_date( $event, false, 'Y' ) === date( 'Y' ) ) {
		$format = 'j';
	}
	return $format;
}