Ulta 21 Days of Beauty Event 2018 preview available now: ulta.com/21days/. The semi-annual Ulta 21 Days of Beauty Event (one of the beauty retailer’s biggest sale events of the year) is scheduled on Sep 2 – 22, 2018. Ulta (NEW) Numerous products from beloved brands like Too Faced, Becca, Stila, and CoverFX will all be 50% discounted throughout the month. There are 3 types of deals we can preview now! Ulta 21 Days of Beauty Event 2018 – Daily Beauty Steals This post may contain affiliate links. Read the full disclosure.