This story was updated April 7, 2017 with new quotes.

Grab a brother or sister and hug 'em tight: Monday is National Siblings Day.

Observed every year on April 10, National Siblings Day honors our closest relatives. Founded by New Yorker Claudia Evart after her siblings died, the holiday hasn't gone national yet but was a trending topic last year on social media, according to the Siblings Day Foundation website

"Siblings are a special gift, and bonding amongst them is vital part of keeping our families, communities and nation strong," the site reads. "Brothers and sisters provide an anchor for one another, becoming some of our closest friends and most trusted advisers."

Whether you've got a sis or a bro or a friend you're close to, take some time Sunday to let them know you care. Below are quotes, separated by topic and collected from Goodreads, QuoteGarden and Psychology Today, to share.

Quotes about brothers:

“He is my most beloved friend and my bitterest rival, my confidant and my betrayer, my sustainer and my dependent, and scariest of all, my equal.” ― Gregg Levoy

"That's the function of big brothers... to help their little sisters when their worlds are collapsing." — Susan Beth Pfeffer

"A brother is a friend given by Nature." ― Jean Baptiste Legouve

“Half the time when brothers wrestle, it’s just an excuse to hug each other.” ― James Patterson

"We are not only our brother's keeper; in countless large and small ways, we are our brother's maker." ― Bonaro Overstreet

"When brothers agree, no fortress is so strong as their common life." — Antisthenes

Quotes about sisters:

"Sisters annoy, interfere, criticize. Indulge in monumental sulks, in huffs, in snide remarks. Borrow. Break. Monopolize the bathroom. Are always underfoot. But if catastrophe should strike, sisters are there. Defending you against all comers." ― Pam Brown

"A sister is a little bit of childhood that can never be lost." ― Marion C. Garretty

"Sweet, crazy conversations full of half sentences, daydreams and misunderstandings more thrilling than understanding could ever be." — Toni Morrison

"How do people make it through life without a sister?" ― Sara Corpening

"A sister is a gift to the heart, a friend to the spirit, a golden thread to the meaning of life." ― Isadora James

"Is solace anywhere more comforting than in the arms of a sister?" — Alice Walker

Quotes about all siblings:

“Siblings that say they never fight are most definitely hiding something.” ― Lemony Snicket

"Our siblings. They resemble us just enough to make all their differences confusing, and no matter what we choose to make of this, we are cast in relation to them our whole lives long." ― Susan Scarf Merrell

"A sibling may be the keeper of one’s identity, the only person with the keys to one’s unfettered, more fundamental self." — Marian Sandmaier

"We are brothers and sisters. We are one sacred family." — Lailah Gifty Akita

"Your parents leave you too soon and your kids and spouse come along late, but your siblings know you when you are in your most inchoate form." ― Jeffrey Kluger

"If we stood close to each other, side by side, as true brothers and sisters, then evil would not know how to stand between us." — Suzy Kassem