May 21 National Days

May 21 is the 141st day of the year (142nd in leap years) in the Gregorian calendar, leaving 224 days until the end of the year. Today’s observances span everything from sustainable fishing and cultural diversity to strawberries, slushies, and even sci-fi swords.

National Days on May 21st — May 21st National Days

Several of the days celebrated on May 21 change each year based on weekday placement, including Employee Health and Fitness Day, Juice Slush Day, and World Product Day. The rest are fixed on the calendar.

Here’s a full overview of the 18 national and international days observed on May 21.

National and International Days on May 21

Cool Sword Day: Started in 2024 by entertainment website Polygon, Cool Sword Day invites fans to celebrate the imaginative world of fantasy swords. From legendary blades in video games to iconic weapons in books and movies, this day honors the creativity and artistry behind fictional swordplay. It’s a great excuse to geek out over the coolest swords ever designed and the stories they bring to life.

I Need A Patch For That Day: Created by Thomas and Ruth Roy of Wellcat Holidays, this tongue-in-cheek day highlights just how many things in life could be solved with a “patch.” Whether it’s software bugs, worn-out jeans, or life’s unpredictable moments, the day humorously celebrates our universal desire for quick fixes and clever solutions.

International Tea Day: Although first celebrated informally in tea-producing countries starting in 2005, this observance became official in 2020 when the United Nations adopted May 21 as International Tea Day. The goal is to recognize tea’s cultural and economic importance while promoting sustainable production and consumption. Tea remains one of the most consumed beverages in the world, and this day highlights its role in supporting livelihoods and reducing hunger.

National American Red Cross Founder’s Day: Observed on May 21 to honor the founding of the American Red Cross and the work of Clara Barton, who brought the idea of the organization to the U.S. after working with the International Red Cross in Europe. She officially founded the American Red Cross in 1881, and this day recognizes her humanitarian legacy and the organization’s ongoing commitment to disaster relief and emergency response.

National Memo Day: Created in 1989 by KMJI Majic Radio 100 FM in Denver, Colorado, this day acknowledges the role of memos in everyday communication, especially in the workplace. From casual reminders to confidential notes, memos are an enduring way to share information. Today’s observance also reflects on how memos have evolved—now often shared through email, apps, and social media.

National Strawberries and Cream Day: This day celebrates the timeless pairing of fresh strawberries and whipped cream—just in time for peak strawberry season. Held every year on May 21, it’s a great excuse to enjoy this refreshing treat and marks a highlight within National Strawberry Month. Strawberries are low in calories, high in vitamin C and fiber, and perfect for springtime snacking.

National Talk Like Yoda Day: Inspired by the quirky and wise Jedi Master from The Empire Strikes Back, this fan-driven holiday emerged in the early 2000s to honor Yoda’s first film appearance in 1980. Known for his unusual sentence structure and timeless wisdom, Yoda remains a favorite character in the Star Wars universe. Fans celebrate by mimicking his speech and sharing quotes in his distinctive voice.

National Waitstaff Day, also known as National Waiters and Waitresses Day, recognizes the hardworking servers who keep restaurants running smoothly. Founded by Gaylord Ward, this day encourages patrons and restaurant owners to show appreciation for the service, professionalism, and multitasking skills waitstaff bring to every dining experience. Related observances include National Hospitality Workers Appreciation Day on February 23.

World Day for Cultural Diversity for Dialogue and Development: Declared by the United Nations in 2002, this day promotes understanding and respect among different cultures. It stems from UNESCO’s Universal Declaration on Cultural Diversity and encourages individuals and communities to embrace inclusion and intercultural dialogue. Often shortened to “Diversity Day,” it highlights how cultural exchange contributes to peace and development.

World Fish Migration Day* (celebrated every other year on May 21): First observed in 2014 and organized by the World Fish Migration Foundation, this international event raises awareness of the need for free-flowing rivers and healthy migratory fish populations. Starting in 2025, the event will be led by VENAE in the Netherlands. Dams and other barriers often threaten fish migration routes, and this day brings global attention to the importance of river restoration and conservation efforts.

World Product Day* (Third or Fourth Wednesday in May): Established in 2018 by Mind the Product, this observance brings attention to the field of product management and celebrates those involved in building and improving products. With meetups in over 140 cities, it’s part of a global movement to raise awareness of how products impact everyday life and the economy. Events often focus on collaboration, design, and innovation.