Father, son to celebrate their unusual Leap Year birthdays

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A California father and son are gearing up to celebrate their 15th and 5th birthdays on Monday. And while the math on their ages may sound a little off -- it's not!

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Fred Shekoufeh and his son Eric were both born on February 29th, which makes them Leap Year babies.

The likelihood of a parent and child both being born during Leap Year is approximately 1 in 2.1 million, according to TIME Magazine.

Leap Year occurs every four years, so if you're counting their birthdays by normal calendar years, Fred is actually turning 60 and Eric will make 20.

Fred admitted to the Huffington Post that celebrating their birthdays can get confusing, but it usually makes for an unforgettable experience, like when he turned 10 years old in 1996, the year Eric was born.

"My ex-wife was in labor and said, 'This is your birthday present,'" Shekoufeh said. "When the doctor found that out, she said, "I will try to bring that baby out so it can share your birthday."

One of Eric's favorite birthdays was when he turned 4 in 2012.

"Everyone and their mother made a joke about me turning four, and that four-year-olds shouldn't be able to drive cars. Well, evidently I could," he said. "I was glad to have an actual birthday on such on emphatic year: getting a license. No confusion at the DMV. I hope I can say the same when I'm going out for my 21st."

Next year Eric will likely have to give the bartender some kind of explanation when he hands over his license for his first legal drink.

"Legally, I should be able to drink on the 28th, but I'm expecting a bouncer to look at my license and tell me it's a fake," he said.

On the bright side, the pair will never really have to worry about aging gracefully.

RELATED: Worlds oldest people:

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Father, son to celebrate their unusual Leap Year birthdays
TO GO WITH AFP STORY Centenary twins, Paulette Olivier (L) and Simone Thiot (R) pose with an old picture of their 20 years inside their room at the retirement home 'Les Bois Blancs' on February 11, 2016. The twins, birth name Lamolie, were born on January 30, 1912 at 11 o'clock at the address Impasse 'du coteau' in Limeray, a few kilometres from Amboise. The two sisters aged 104 years are believed to be the two oldest twins in the world. / AFP / GUILLAUME SOUVANT (Photo credit should read GUILLAUME SOUVANT/AFP/Getty Images)
TO GO WITH AFP STORY Centenary twins, Paulette Olivier (R) and Simone Thiot (L) walk in the corridors at the retirement home 'Les Bois Blancs' on February 11, 2016. The twins, birth name Lamolie, were born on January 30, 1912 at 11 o'clock at the address Impasse 'du coteau' in Limeray, a few kilometres from Amboise. The two sisters aged 104 years are believed to be the two oldest twins in the world. / AFP / GUILLAUME SOUVANT (Photo credit should read GUILLAUME SOUVANT/AFP/Getty Images)
Worlds oldest person Jeralean Talley attends the 17th Annual Ford Freedom Awards at Max Fischer Music Center on May 5, 2015 in Detroit, Michigan. (Photo by Monica Morgan/WireImage via Getty)
Misao Okawa, the world's oldest Japanese woman, poses for a photo on her 117th birthday celebration at Kurenai Nursing Home on March 4, 2015 in Osaka, Japan. Japanese woman Misao Okawa is oldest living person in the world as certified by the Guinness World Records, who celebrates her 117 birthday on March 5. Okawa has been dubbed the worlds oldest living person since the June 12, 2013 death of 116 years and 54 days old Jiroemon Kimura, also Japanese. She is ranked first Oldest Japanese person ever and third person reached to 117in the world. (Photo by Buddhika Weerasinghe/Getty Images)
Misao Okawa, the world's oldest Japanese woman looks on before her 116th birthday celebrations at Kurenai Nursing Home on March 5, 2014 in Osaka, Japan. Okawa, born in Tenma, Osaka, on March 5, 1898 to a family of Kimono merchants, married in 1919 and had three children, of which a daughter and a son are still alive, and has four grandchildren and six great-grandchildren. (Photo by Buddhika Weerasinghe/Getty Images)
Family Portrait Of Sarah Knauss (Seated Left) The World's Oldest Women June 15, 1999. (Photo By Theo Westenberger/Getty Images)
Christian Mortensen enjoys a birthday cigar during his 115 birthday celebration at The Aldersly Garden Retirement Community where he resides 15 August. Mortensen, the world's oldest man, attributes his longevity to drinking lots of water, living life with a positive attitude, and smoking a weekly cigar. (Photo by Monica M. Davey/AFP/Getty Images)
Christian Mortensen, 114 years-old, takes a puff from his cigar at his home in the Aldersly Retirement Community in San Rafael, California Mortensen is the oldest man alive as he will celebrate his 115 birthday on August 16th. (Photo by John G. Mabanglo/AFP/Getty Images)
Walter Breuning, the 'World's Oldest Man,' receives one of the Freemasons' highest honors, a George Washington Gavel, at his 113th birthday party on September 21, 2009 at the Rainbow retirement home in Great Falls, Montana. Breuning, born Sept. 21, 1896 in Melrose Minnesota, inherited the title of 'World's Oldest Man' when Henry Allingham of England died last July 18. Breuning moved to Great Falls in 1918 with the expansion of the railroad and worked in the railroad business for 50 years. He says he stays healthy by eating just two meals per day and exercises by strolling the halls of the retirement home with the aid of a walker. His earliest memory is of hearing his grandfather talk about fighting as a Union soldier in the Civil War. (Photo by John Moore/Getty Images)
Walter Breuning, at age 112 now considered the oldest man in the world, smiles while at the Rainbow Assisted Living Facility on July 23, 2009 in Great Falls, Montana. Bruening, born Sept. 21, 1896 in Melrose Minnesota, inherited the title when Henry Allingham of England died last weekend. Breuning moved to Great Falls in 1918 with the expansion of the railroad and worked for the railroad for 50 years. He says he stays healthy by eating just two meals per day and excercises by strolling the halls of the retirement home with the aid of a walker. He shuns medicine, except for one low-dose aspirin per day. His earliest memory is of hearing his grandfather talk about fighting as a Union soldier in the Civil War. The Guinness World Records is expected to make the official announcement soon, after verifying his records. (Photo by John Moore/Getty Images)
Yukichi Chuganji, certified by Guinness World Records as world's oldest man, celebrates his 113th birthday in Ogiri, Fukuoka Prefecture 23 March 2002. Chuganji was born in 1889 and made living breeding silkworm and working for a bank. (Photo via Jiji Press/AFP/Getty Images)
Spanish Joan Riudavets Moll, born 15 December 1889 in Es Mitjorn Gran, Menorca, poses for photographers during his birthday party. Riudavets, a former shoemaker, sleeps up to 14 hours a day, only suffers pain in his legs but can walk. He watches TV, reads newspapers and gives a lot of importance to food, especially yoghurts. (Photo by Oscar Pipkin/AFP/Getty Images)
Spanish Joan Riudavets Moll, born 15 December 1889 in Es Mitjorn Gran, Menorca, blows candles next to Rosa Estaras the Vice-President of the Balearic Government during his birthday party. Riudavets, a former shoemaker, sleeps up to 14 hours a day, only suffers pain in his legs but can walk. He watches TV, reads newspapers and gives a lot of importance to food, especially yoghurts. (Photo by Oscar Pipkin/AFP/Getty Images)
Japan's oldest person Yoneko Minagawa, 113, smiles as she receives a flower bouquet at a nursing home in the town of Fukuchi in Fukuoka prefecture, on Japan's southern island of Kyushu 15 September 2006, ahead of the Japanese holiday 18 September, 'Respect for the Aged Day'. Yoneko Minagawa was born 04 January 1893, becoming Japan's oldest person when Ura Koyama died last year. Meanwhile Japan's oldest man, Tomoji Tanabe of Miyazaki prefecture, also on Kyushu island, turned 111 years old 18 September to coincide with the national holiday. (Photo via Jiji Press/AFP/Getty Images)
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