When Is National Twin Day? | The US Sun

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DECEMBER 18th, celebrates all things twin.

With a connection so special, it is no wonder that twins have a whole day dedicated to themselves.

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Picture of identical twin boys

When is national twin day?

National twin day is celebrated on December 18th of each year.

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About 1.6 million twins are born each year around the world, according to BBC News.

“Africa and Asia make up about 80% of all twin deliveries in the world at present.”

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When did national twin day become official?

National twin day was made official by National Day Calendar in 2019.

Here are some fun ways to observe national twin day:

  1. Share photos or videos on social media of your favorite memories with your favorite twins; they may be family, friends, or even your own twin sibling.
  2. Host a twin party by inviting your twin friends and making others who are invited find the person that looks closest like them to pretend to be twins for a day.
Picture of twin boysCredit: Getty – Contributor

What is the difference between identical and fraternal twins?

Identical twins develop from a single fertilized egg and have the exact same DNA, although they may not look perfectly alike.

Fraternal twins develop from two separate fertilized eggs and do not contain the same DNA. Examples of fraternal siblings include boy and girl twins.

“A boy has XY chromosomes and a girl has XX chromosomes. Girl-boy twins occur when one X egg is fertilized with an X sperm, and a Y sperm fertilizes the other X egg,” according to healthychildren.org.

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Some twins may even have different birthdays due to delays in childbirth.

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