Sunday is National Siblings Day

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(Photo by R. Viner/Daily Express/Getty Images)

(April 10, 2016) – It’s time to let your brothers and sisters know how much you appreciate them. Sunday is National Siblings Day!

Every year on April 10, the day is observed to honor the bonds between brothers and sisters.

According to the Siblings Day Foundation, New Yorker Claudia Evart founded this day after she lost both her siblings early in life. She chose April 10 because that was the birthday of her late sister, Lisette.

“Siblings Day follows the spirit of Mother’s Day and Father’s Day — a great American tradition and celebration of family-unit values,” the organization’s website says. “It is an uplifting celebration honoring people who have shaped our values, beliefs and ideals.”

It isn’t an official national recognized holiday, but the Siblings Day Foundation is actively petitioning the White House to issue a presidential proclamation.

People on social media are posting photos with their siblings using the hashtag #NationalSiblingsDay.

CNN contributed to this article.