National Sisters Day 2017: 5 Fast Facts You Need to Know

National Sisters Day, National Sisters Day origin, National Sisters Day facts, famous sisters

Getty Sisters Serena and Venus Williams at Wimbledon in 2009.

August 6 marks National Sisters Day, as well as National Friendship Day. While it’s a nice idea to always have a friendly relationship with your sister, today’s the day to do something really special. It’s a good thing it’s a Sunday, too!

There are plenty of famous sisters, from the reality TV Kardashian sisters to the tennis stars Venus and Serena Williams. Movie lovers know that Olivia De Havilland‘s sister is the late Joan Fontaine. Kate Middleton, the Duchess of Cambridge, also has a famous sister, Pippa.

Here’s a look at National Sisters Day!

1. The Creator of National Sisters Day Is Unknown, but Google Searches Started in 2012

National Sisters Day, National Sisters Day origin, National Sisters Day facts, famous sisters

GettySisters Zooey and Emily Deschanel at the 2013 Emmys.

The creator of National Sisters Day is a mystery, notes National Day Calendar. The holiday is also referred to online as “National Sisters Day” and “National Sister‘s Day.”

Google Trends shows searches for “National Sisters Day” first spiked in August 2012. That year, The Huffington Post published a list of quotes for Sisters Day.

National Sisters Day is celebrated on the first Sunday of August that way you get a full day of celebrating.

2. A 1996 Study Showed That Kids Spend More Time With Siblings Than Anyone Else, Including Themselves

National Sisters Day, National Sisters Day origin, National Sisters Day facts, famous sisters

GettyThe future Queen Elizabeth II and her sister, Princess Margaret, in 1950.

A widely cited Penn State University study published in 1996 found that by the time children are 11 years old, they devote 33 percent of their free time to their siblings, notes Time Magazine. That’s more time than what they devote to their friends, parents and teachers. It’s even more time than how much they set aside to be by themselves.

Other studies showed that adolescents devote 10 hours a week to activities with siblings, even though their free time is more limited by school and work responsibilities.

“In general, parents serve the same big-picture role as doctors on grand rounds. Siblings are like the nurses on the ward. They’re there every day,” psychologist Daniel Shaw of the University of Pittsburgh told Time in 2006.

Another study from 1991 found that about 80 percent of all Americans have a sibling.

3. Serena & Venus Williams Have Played Against Each Other 28 Times & Won 3 Olympic Gold Medals Together

National Sisters Day, National Sisters Day origin, National Sisters Day facts, famous sisters

GettyVenus and Serena Williams at the 2017 Australian Open.

Arguably the most famous sister pair on the planet is tennis stars Venus and Serena Williams, who have both dominated the sport for over 20 years. Venus, now 37, made her pro debut in 1994 at age 14. Serena, now 35, turned pro in September 1995, days before she turned 14. Since then, Venus has won 49 singles titles and Serena has 72.

At Wimbledon 2017 in July, Venus admitted that it was difficult to be there without her sister. Serena has sat out the season because she’s expecting her first child.

“I had to get used to not having Serena around fast, when I walked into the grounds there was a definite void, because we spend so much time together. It was really sad,” Venus said in a press conference, notes Express.

Serena leads the professional rivalry with a 17-11 record. They last faced each other at the 2017 Australian Open, where Serena won her 23rd Grand Slam title.

The Williams sisters have also been successful as a Doubles duo. They have won Olympic gold medals at the 2000 Sydney, 2008 Beijing and 2012 London Games. They also have 14 Grand Slam Doubles titles.

4. Pippa Middleton Says Her Relationship With Duchess Kate Is Still Close, Despite Her Royal Title

National Sisters Day, National Sisters Day origin, National Sisters Day facts, famous sisters

GettyPippa Middleton and Catherine, the Duchess of Cambridge in 2012.

Another world-famous sister duo is Catherine and Pippa Middledton. The 35-year-old Catherine is married to Prince William and will one day become queen consort. The 33-year-old Pippa married James Matthews in May 2017.

In her first ever TV interview in 2014, Pippa told Matt Lauer on the Today Show that she remains close to her sister, despite Kate’s royal status.

“I mean, obviously she has pressures that she’s taken on and things. But we spend a lot of time together. We still do a lot together as a family,” Pippa told Lauer. “And I think that’s really the heart for all of us is having a really close family that we can sort of be normal with each other, treat each other normally. And that’s sort of kept us all, you know, affixed to the ground.”

Pippa is also aunt to William and Kate’s children, Prince George and Princess Charlotte.

Of course, another famous Royal sisters pair is William’s grandmother, Queen Elizabeth II and the late Princess Margaret. In May 2017, Queen Elizabeth II was seen carrying a purse with Margaret’s image on it.

5. Don’t Worry, There Is a National Brothers Day, too

National Sisters Day, National Sisters Day origin, National Sisters Day facts, famous sisters

GettyKhloe, Kim and Kourtney Kardashian in 2013.

If you have a brother feeling a little left out today, don’t worry. There is a National Brothers Day, although you’ll have to wait awhile for it to happen again. Brother’s Day takes place on May 24. The holiday is credited to C. Daniel Rhodes of Alabama.

There is also National Siblings Day, which was on April 10. That day has much more history behind it, as the Siblings Day Foundation has been successful in inspiring governments across the country to make proclamations. Presidents Bill Clinton and George W. Bush also recognized the holiday. It was founded by Claudia Evart, who lost both of her siblings in two separate accidents and wanted a way to honor the bond between siblings.

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