Show all events past, present and future in photo view (TEC/ECP 3.9.x)

all-events-photo-view.php

add_action( 'tribe_events_pre_get_posts', 'show_all_in_photo_view' );

function show_all_in_photo_view( $query ) {
	// Only modify the main query
	if ( ! $query->is_main_query() ) return;

	// Only modify photo view (comment out or delete the following
	// line to remove this restriction)
	if ( 'photo' !== $query->get( 'eventDisplay' ) ) return;

	// Show all events
	$query->set( 'posts_per_page', -1 );
	$query->set( 'start_date', '1000-01-01' );
	$query->set( 'end_date',   '5000-01-01' );
}