If you’re a beauty enthusiast, mark your calendar: Sephora’s spring sale is right around the corner. The Sephora Savings Event is one of only a few sitewide sales the retailer has all year, so it’s a great time to stock up on your go-to cosmetics, treat yourself to a luxury beauty find or try out the latest viral beauty trend. Similar to the retailer’s past sales, the timing of your shopping window and the extent of your savings depend on your rewards membership tier. Below, we lay out the key details for Sephora’s upcoming spring sale and highlighted a few of our favorite…