Stumbled upon this earlier today:
http://www3.hilton.com/en/hotels/new.../100096040.htm
Enjoy 40% off in Asia Pacific
For stays booked between 7 November 2016 8am (GMT) and 11 November 2016 8am (GMT), and completed by 17 April 2017.
Perfect timing as I have a fair few Asia Pacific bookings to do for the next few months