By R. Robles ( | First Posted: Jan 03, 2016 07:20 AM EST

Caption:EDINBURGH, SCOTLAND - DECEMBER 31: Unicef wishes Edinburgh a #HappyBlueYear by adding a hint of blue to the iconic Hogmanay firework display on December 31, 2015 in Edinburgh, Scotland. (Photo : Ross Gilmore/Getty Images for Unicef)

These two newborn babies are twins but their birthday is something they can't apply the expression "twinning" on.

Maribel and Luis Valencia are expecting fraternal twins. Like many pregnancy cases, however, Maribel gave birth earlier than anticipated. In a startling turn of events, the first baby -- a baby girl, named Jaelyn -- was born at 11:59 P.M. on New Years' Eve. On the other hand, her twin brother -- a baby boy named Luis -- popped out three minutes later, 12:03 A.M., on New Years' Day. It is uncommon that twins are born on different days, more so on different years.

According to the San Diego Kaiser Permanente Zion Medical Center, the twins were both 18.5 inches long. Moreover, as per NBC New York, Baby girl Jaelyn weighed four pounds (15 ounces), while Baby boy Luis weighed five pounds (nine ounces). The mother and her twins were reported to be happy and healthy.

NBC New York furthered that the twin's times of birth may indicate that Baby girl Jaelyn is the last baby born in 2015 in San Diego County area and Baby boy Luis is possibly the first baby born in 2016 in their place.

The twin's mother, Maribel, works as a cashier at the San Diego International Airport and their father, Luis, is a United State Navy diesel mechanic. Jaelyn and Luis have an older sibling named Isabella who is three years old. The Valencia family lives in San Diego.

Luis shared that her eldest daughter "was surprised and a little shocked about how her siblings came into the world."

"[Maribel] really wanted to have the babies on the same birthday because you know later on in the years, they're going to have a little confrontation and be like, 'my birthday came first,' so it means two birthday parties, back to back," he said.

"We were actually watching the clock. We wanted to see if we were one of the first ones," Luis quipped.

"It was around midnight and she was just popping out, it was crazy seeing her little head pop out first," Maribel shared, as per Washington Post. "It's a big blessing to have two of them, [a] boy and a girl, for New Year's," she added.

An observer from the hospital commented on the twin's birth times. "It's very unusual and it's very special," said nurse Lynnette Coetzee, adding, "and I haven't seen it in all my 34 years of nursing." Coetzee jokingly added that the birth of the twins might have an effect on family dynamics.

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