Hey @joechanaalimited,
Order numbers in WooCommerce are based on the next available “post ID” from WordPress. This means that every time a product, post, page, etc, is created on the site, the post ID increases. There are plugins that can help you get more control over the order numbering system, like this free example here on WordPress.org and this paid plugin on WooCommerce.com. However, if you want to add the date or reset numbers based on the date, you would either need to do that manually or via custom code.
I hope that helps, but if you have any other questions, let me know!
I’m going to go ahead and close this thread since we haven’t heard back in a bit but if you have any other questions, feel free to create a new thread. Thanks!