leapicide
n.— «And then there are some who just cheat, period. “I went to high school with one other person who was born on a leap day and she told people who asked that her birthday was on Feb. 28, even though it wasn’t,” she said, something leap year folks sometimes refer to as “leapicide.”» —“Forever young: These quadrennial birthday folks have secret to eternal youth” by Elizabeth Cohen Press & Sun Bulletin (Binghamton, New York) Feb. 29, 2008. (source: Double-Tongued Dictionary)