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function render_block_core_calendar( $attributes ) {
	global $monthnum, $year;

	// Calendar shouldn't be rendered
	// when there are no published posts on the site.
	if ( ! block_core_calendar_has_published_posts() ) {
		if ( is_user_logged_in() ) {
			return '<div>' . __( 'The calendar block is hidden because there are no published posts.' ) . '</div>';
		}
		return '';
	}

	$previous_monthnum = $monthnum;
	$previous_year     = $year;

	if ( isset( $attributes['month'] ) && isset( $attributes['year'] ) ) {
		$permalink_structure = get_option( 'permalink_structure' );
		if (
			str_contains( $permalink_structure, '%monthnum%' ) &&
			str_contains( $permalink_structure, '%year%' )
		) {
			$monthnum = $attributes['month'];
			$year     = $attributes['year'];
		}
	}

	$color_block_styles = array();

	// Text color.
	$preset_text_color          = array_key_exists( 'textColor', $attributes ) ? "var:preset|color|{$attributes['textColor']}" : null;
	$custom_text_color          = $attributes['style']['color']['text'] ?? null;
	$color_block_styles['text'] = $preset_text_color ? $preset_text_color : $custom_text_color;

	// Background Color.
	$preset_background_color          = array_key_exists( 'backgroundColor', $attributes ) ? "var:preset|color|{$attributes['backgroundColor']}" : null;
	$custom_background_color          = $attributes['style']['color']['background'] ?? null;
	$color_block_styles['background'] = $preset_background_color ? $preset_background_color : $custom_background_color;

	// Generate color styles and classes.
	$styles        = wp_style_engine_get_styles( array( 'color' => $color_block_styles ), array( 'convert_vars_to_classnames' => true ) );
	$inline_styles = empty( $styles['css'] ) ? '' : sprintf( ' style="%s"', esc_attr( $styles['css'] ) );
	$classnames    = empty( $styles['classnames'] ) ? '' : ' ' . esc_attr( $styles['classnames'] );
	if ( isset( $attributes['style']['elements']['link']['color']['text'] ) ) {
		$classnames .= ' has-link-color';
	}
	// Apply color classes and styles to the calendar.
	$calendar = str_replace( '<table', '<table' . $inline_styles, get_calendar( true, false ) );
	$calendar = str_replace( 'class="wp-calendar-table', 'class="wp-calendar-table' . $classnames, $calendar );

	$wrapper_attributes = get_block_wrapper_attributes();
	$output             = sprintf(
		'<div %1$s>%2$s</div>',
		$wrapper_attributes,
		$calendar
	);

	$monthnum = $previous_monthnum;
	$year     = $previous_year;

	return $output;
}