Ulta 21 Days of Beauty 2018 date March 18 – April 7 more info here: ulta.com/21days. Ulta hosts Ulta 21 Days of Beauty twice a year, normally in March and September. See full spoilers, schedule, links, images and tips for Ulta 21 Days of Beauty Event below. Ulta Beauty will run their major Spring event: Ulta 21 Days of Beauty Event from 3/18 – 4/7. Ulta page could go live anytime, see here. This post may contain affiliate links. Read the full disclosure.