Set calendar to June in month view

june-calendar.php

function tribe_set_default_date( $wp_query ) {
	// Only run on main event queries
	if ( ! tribe_is_event_query() || ! $wp_query->is_main_query() || $wp_query->get( 'eventDate' ) != '' ) return;
	$date = '2019-06-01';
	if (
		tribe_is_month()
	) {
		$wp_query->set( 'eventDate', $date );
	}
}
if ( function_exists( 'tribe_is_event_query' ) ) {
	add_action( 'parse_query', 'tribe_set_default_date', 100 );
}