The UAE's Biggest Water Battle Sunday 2 December at 11:47am To celebrate the 47th UAE National Day, Yas Waterworld is hosting it's annual Water Battle! Families can choose different coloured water pistols and soak each other in the Amwaj battle arena. The UAE's Biggest Water Battle will begin at 11:47am to celebrate the 47th UAE National Day. Make sure you arrive on time. *Limited Water Pistols Available, distributed on a first come first serve basis. Follow for updates on shows and events.