Turn off the WooCommerce Store Notice at a specific date and time.

modify_woocommerce_demo_store_turn_off_date.php

<?php
/**
 * Turn off the WooCommerce Store Notice at a specific date and time.
 */
function modify_woocommerce_demo_store_turn_off_date( $notice_html ) {
	// Set the current date variable.
	$current_date = date( 'Y-m-d H:i:s', current_time( 'timestamp' ) );

	// Change this line to set the store notice end date and time variable.
	$end_date = '2022-06-08 10:00:00';

	// If the current date is before the end date, show banner.
	if ( $current_date < $end_date ) {
		return $notice_html;
	}

	// Return an empty string if not within the set time.
	return '';
}
add_filter( 'woocommerce_demo_store', 'modify_woocommerce_demo_store_turn_off_date', 11 );