Sometimes, just like physical stores, your WooCommerce website may need a few days off!
Nothing special there, as long as online customers are aware of the fact you will be reopening soon.
In WooCommerce words, this means hiding the add to cart buttons (one line of code) and also show a little notice on every WooCommerce page (one simple setting).
Enjoy!

1) PHP Snippet: WooCommerce Holiday / Catalog Mode – Hide Add to Cart Buttons
/**
* @snippet WooCommerce Holiday/Pause Mode
* @how-to Get CustomizeWoo.com FREE
* @author Rodolfo Melogli
* @testedwith WooCommerce 6
* @donate $9 https://businessbloomer.com/bloomer-armada/
*/
add_filter( 'woocommerce_is_purchasable', '__return_false' );
2) Setting: WooCommerce Holiday / Catalog Mode – Enable Store Notice
Go to WP Dashboard > Appearance > Customize > WooCommerce > Store Notice, type in your message, and click on “Enable store notice” (see screenshot above).