WordPress at a glance
function is not described

register_block_core_archives() WP 1.0

Register archives block.

No Hooks.

Return

Nothing (null).

Usage

register_block_core_archives();

Code of register block core archives: wp-includes/blocks/archives.php VER 5.0.3

<?php
function register_block_core_archives() {
	register_block_type(
		'core/archives',
		array(
			'attributes'      => array(
				'align'             => array(
					'type' => 'string',
				),
				'className'         => array(
					'type' => 'string',
				),
				'displayAsDropdown' => array(
					'type'    => 'boolean',
					'default' => false,
				),
				'showPostCounts'    => array(
					'type'    => 'boolean',
					'default' => false,
				),
			),
			'render_callback' => 'render_block_core_archives',
		)
	);
}