It’s no secret that denim is adaptable for any occasion. However, it’s often difficult to know what to pair it with and where to wear it. Here at Yumi HQ, we’re breaking the rules of denim being a casual fabric. Gone are the days of feeling underdressed and too informal at the office or at dinner; formal denim is on its way back and we’re ready for it. To challenge this theory, we’ve complied a list of outfits to wear for each day of the week. What’s more, it only includes one staple piece: a denim skirt. For Monday to Sunday style without the hassle, here are 8 ways (we’ve…