ASOS December 2018 Flash Sales Timed Sale! Up to 60% off Gifting! Valid 12/14-12/17 8am GMT. Flash Sale! 15% off Everything through app only with code: APPTIME. Valid 12/14-12/17 2am GMT. Last Chance! Up to 50% off! Shop Now! Valid 12/17-12/20 2am GMT. Get 25% off everything when you spend $200. Last chance delivery 12/20 with code: LASTMIN. Valid 12/18-12/20 11pm GMT.