SOMERVILLE, NJ – Mia Ospino doesn’t know it yet, but she is now a member of a very exclusive club.

She’s a Leapling, and when she’s old enough, she can thank an ancient world leader for her special day.

There are an estimated 187,000 Americans who call themselves Leaplings – people who were born on Leap Day in the Leap Year, which rolls around every four years.

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There are 365.24219 days in a calendar year, meaning that every four years, an extra day must be added to the calendar to maintain seasonal balance. In theory, traditional holidays would be pushed ahead, days, weeks, months at a time over hundreds and thousands of years.

Realizing the conundrum, Julius Caesar created Leap Day in 46 B.C.

Mia Juliet Ospino was born yesterday at 12:41 p.m. at Robert Wood Johnson University Hospital-Somerset, the only baby to be born at the hospital on Leap Day, Feb. 29.

She is the second child of Yesenia Santana and Benny Ospino of Raritan. Mia will meet her six-year old brother, Julius Castro when she and mom come home on either Wednesday or Thursday.

 She weighed 6 pounds, 5 ounces, is 19 ¼ inches long and was delivered by Caesarean section by Dr. Marlan Schwartz. The decision was reached to deliver her via Caesaren because the baby had breached, according to the mother.

“It had to be today, it couldn’t wait,” her father said.

Mia, her mom – and dad are all doing well.

“She’s beautiful, it was love at first sight,” said the proud father. “I think she looks more like her mother, and that’s a good thing, because she’s better looking than me,” he added.

“We’ve known for five months what we were going to name her,” Yesenia said.

Knowing that their baby was going to be a girl, the couple painted her room pink.

“It’s all decorated, everything is set up, the crib and all that stuff,” she added.

“They had an awesome baby shower for her, we have everything we need for her,” her father said.