Special Discounts on Additional Licenses: Tuesday, March 15th U.K. Time Zone?

This offer ends on which time zone or is it U.K. business time? Would like to make sure that when I get home I still have enough time to purchase License(s).
It will be 12:30 am March 16th U.K. by the time I get home... I think it is 7 hrs differences between MDT and UK... It is about 6:30pm here and wonder if you observe 'Day Light Savings'. Might try to get this by tomorrow.