For the second year now, I will try to bring you discounts and codes valid for this occasion in the most used beauty-related webshops. For my European readers, I will signal the American website for which you might be charged customs costs. I would personally not suggest you make big purchases (above ~24$) unless you’re prepared to pay around 40% of your purchase extra.
Black Friday is from tradition the day after the American holiday Thanksgiving and the kickstart of Christmas shopping. Therefore most American shops offer on Black Friday (25.11, day after Thanksgiving) and Cyber Monday (28.11, Monday after Thanksgiving) great deals and discounts. In this globalized world, these days have been adopted by European brands as well to push consumers to start holiday shopping.