Michaels 20% off Entire Order Coupon (including sale items!) This post may contain affiliate links. Please see the full disclosure policy here. Posted on February 4, 2011 Written by Mary 1 Comment Michaels has another 20% off coupon available here. AND it’s good on sale items as well! I LOVE these! Looks like my daughter and I are going shopping tonight! Valid today & tomorrow (Feb 4&5) only.