When you only have a quarter of the birthdays most people have, you pull out all the stops.

That's why leapers - those (un)lucky souls who were born on Feb. 29 - make a big deal of their birthday falling on a day which only appears on calendars once in four years.

They've got a magazine, Leapzine, and a band called Rookie Card has written a song in their honour called 2/29.

They've got an honour roll, run lists of leap day events, pics of leapers (Riley, Rachelle, Roxanne, and Ryan Harris of Canada, quadruplets born in 1988, figure prominently on the site), and even theological disputes.

They split on the question of whether to be a strict Februarian or not. Those that cleave to the strict doctrine celebrate on the last day of February. But, the site said, "there are some diehard partiers among the honoured that celebrate on every day possible."

And like any interest group, they lobby for their members.

The site trumpets a notable success: YouTube and the U.S. chain Borders Books, which had (for computer reasons) been rejecting online applications from leapers, have fixed the bug. "Three cheers for leaper calendar activism."

There's even a math issue; the chance of being born on a leap-year day is one in 1,461. But, in fact, the odds are really slightly lower, because there are only 97 leap days in every 400 years, a function of the Georgian calendar. That actually lowers the odds to of being born on a leap day to one in 1,506.

But because we're in a century with 25 leap days, "unless you were alive before 1901, or, unless you expect to be alive after 2097, during your lifetime, you will enjoy a leap day once every 1,461 days," the site says.

Hooray.