A fun observance on March 23 celebrating the word OK, its history as a global expression of agreement and acceptance, and its origins in an 1839 journalistic joke in the Boston Morning Post.
Last updated February 26, 2026 · by the
Holiday Calendar Team
Allan Metcalf, author of OK: The Improbable Story of America's Greatest Word, created the observance and proposed its first celebration on March 23, 2011, marking the 172nd anniversary of the word OK first appearing in the Boston Morning Post on March 23, 1839.
Get ready to spread some positivity and celebrate OK Day on March 23! This day was created as a way to promote kindness, empathy, and understanding towards ourselves and others. It's a reminder that it's okay to not be perfect and to embrace our imperfections. The origin of this holiday is unknown, but it has gained popularity in recent years through social media and acts of kindness shared online. So let's take this opportunity to spread some love and make someone's day just a little bit brighter!
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WHY THIS DAY MATTERS
In addition to spreading kindness to others, OK Day also encourages us to be kind to ourselves. It reminds us to take care of our own mental and physical health, and accept ourselves for who we are. This holiday promotes self-love and self-compassion, which are important for a healthy and happy life.
OK Day is all about spreading positivity and making those around us feel valued. It encourages us to perform random acts of kindness, whether it's buying someone's coffee or simply giving a compliment. This holiday reminds us of the power small gestures can have on others.
On OK Day, people from all walks of life come together to celebrate our common humanity. It's a chance for us to put aside our differences and focus on what we have in common - our shared human experience. This holiday reminds us that, at the end of the day, we are all more similar than we are different.
Brighten up your day and infuse positivity into your life with Optimist Day - a day devoted to celebrating a "can-do" spirit!
Spread kindness and positivity on National Be Nice Day - a simple smile or kind word can make someone’s day!
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A fun observance on March 1 encouraging people to share smiles to spread joy, positivity, and kindness, highlighting the emotional and health benefits of smiling.
