A 25 per cent discount across a range of merchandise over a three-day period resulted in Dh188.86 million worth of sales for Dubai Duty Free, marking its 31st anniversary on December 20. The sale began at midnight on December 17 and continued for 72 hours until midnight on December 20, the airport retailer said in a statement, in line with the high passenger traffic expected over the pre-Christmas holiday weekend. The watches as the second most popular category on the anniversary day with sales of Dh25.3 million.