Quince has dropped a rare one-day sale, offering discounts of up to 30% off on items such as cashmere sweaters, dresses, and pants. The sale appears to be a surprise event, although some outlets suggest it may be related to a larger post-holiday or Cyber Monday sale. It is unclear how this sale compares to other discounts available from similar retailers, such as J.Crew, which is also offering significant markdowns.