January 1st Sri Vaikunta Ekadasi : It is most important Ekadasi of all. This day is dedicated to Lord Vishnu. In Balaji temples Vaikunta Dwaram is opened on this day, devotees believe, passing thru the Dwaram is as same as entering Vaikuntam (Lord Vishnu's abode). Hindus believe that gates to Heaven are opened on this day.
Vaikunta Dwaram in Temples will open on 4:30 AM on Jan 1st 2015. In USA & UK it falls on 31st December 2014 ( Do check with your Local temple priest).