I took it w/ Obsidian and Willow at the Epic Breeding Island (entirely by chance)
It's 14:30:00 when checked on the breeding time. 15 gems to speed up.
From Dragon Reference Chart, the Leap Year Dragon is the only dragon that has 14.5h of Breeding Time.
hopefully this is it.. will update my wall if it is
--- Update --- Confirmed: Leap Year Dragon
got mine with paper and copper 1st try
I got it accidentally on my first try with a plasma and paper. :)
I bred gift and metal. I was hoping for a silver or gold dragon.:)
You many use any 4 elemnts to breed a leap year (though the chances are ptetty low of obtaining one). But since the LYD is expired you'll have to wait until it returns at the next leap year (Late February 2016).