[Plugin: WooCommerce] Cheapen all prices

Hello,

I have a quick question about WooCommerce. I would like to create a webshop for clothing. Now, after a season, I would like to cheapen all prices at once. So for example, every article in my webshop will be 10% off during a certain period. Is it possible to do this in WooCommerce?

So, what I would like is to have all articles being discounted at once, and not one by one by hand.

Thanks in advance.

Kind regards,

Luc