Here’s a riddle. How can someone be four years old and be old enough to drive?

It might seem illegal, but if you’re a Leap Year baby, then technically you’ve celebrated only four birthdays in 16 years. Only two students out of 1,535 students are Leap Year babies, juniors Brianna Kessler and Paityn Swift. That’s .001 percent of students.

How rare is having a Leap Day birthday? Only 5 million people in the world have a birthday that falls on Feb. 29. The odds of being a Leap Day baby are low: 1 in 1,461. Take 365 days times four years and add one day to account for the one added day. That totals 1,461. On 0nly one day out of those 1,461 can a Leap Year Baby be born.

Kessler celebrates her birthday on Feb. 28. “I like to say my birthday is at the end of February,” she said.

Swift also celebrates her birthday on Feb. 28. “It keeps it in February,” she said.

They have both heard plenty of jokes about their birthdays.

“My dad jokes about not needing a gift because my birthday only comes every four years,” Kessler said. “The biggest one is that technically I’m only four years old. They don’t understand why I’m in high school or driving.”

Like Kessler, Swift hears jokes about her being only four years old. “My friends like to say why do I celebrate my birthday if I don’t have one.”

Kessler said she isn’t glad about being a Leap Year Baby, but she doesn’t dislike it, either.

“It’s clear that I’m one of the rarest,” she said.

Swift said she loves it and hates it at the same time.

“I love it because it makes me different, but I hate it because it [having a birthday] doesn’t happen every year.”