Send an Electronic Greeting Card Day is an informal observance encouraging people to share digital goodwill through e-cards. It appeals to anyone who wants a fast, free, and environmentally light way to stay in touch. The day exists because paper cards still carry emotional weight, yet modern life rewards speed and sustainability. Electronic greetings bridge…

World Metrology Day is an annual global observance held on 20 May to celebrate the importance of measurement science and its role in scientific discovery, trade, health, and environmental protection. It is intended for scientists, regulators, industry professionals, educators, and anyone who relies on accurate measurement in daily life or work. The day coincides with…

Clinical Trials Day is observed each May 20 to recognize the people who design, conduct, volunteer for, and support the studies that test whether new medicines, devices, and preventive strategies are safe and effective. The day is aimed at researchers, health-care staff, patients, policymakers, and the wider public who benefit from or participate in clinical…

World Fiddle Day is an annual global celebration dedicated to the violin family of instruments—most commonly the violin, viola, cello, and double bass—when they are played in folk, traditional, and non-classical styles. It is a day for players, listeners, dancers, luthiers, teachers, and cultural organizations to spotlight the living fiddle tradition and invite newcomers to…

National River Cleanup Day is a coordinated annual event that mobilizes volunteers to remove trash and debris from rivers, streams, and adjacent banks. It is open to everyone from school groups and paddling clubs to corporate teams and municipal staff, and its purpose is to protect aquatic ecosystems, improve water quality, and reduce flood risk…

National Waiters and Waitresses Day is a yearly reminder to acknowledge the millions of servers who carry trays, memorize orders, and calm hungry guests across the United States. It lands every May 21 and offers a quiet cue to notice the people who often set the tone for our meals away from home. The day…

Sherlock Holmes Day is an informal celebration observed worldwide by readers, writers, and screen producers every 22 May, the birthday of Sir Arthur Conan Doyle. It invites anyone intrigued by deduction, Victorian London, or classic mystery fiction to pause and appreciate the cultural legacy of the world’s most famous consulting detective. The day is not…

World Preeclampsia Day is observed every May 22 to spotlight a life-threatening pregnancy complication that affects millions of women, babies, and families worldwide. The day unites patients, clinicians, researchers, and advocates to share evidence, reduce preventable deaths, and improve care before, during, and after childbirth. Although preeclampsia is centuries old, public awareness remains uneven, and…

World Crohn’s and Colitis Day is a global awareness event dedicated to inflammatory bowel disease (IBD), focusing on Crohn’s disease and ulcerative colitis. It is observed every year on May 23 and is intended for patients, caregivers, healthcare professionals, and anyone interested in digestive health. The day exists to increase public knowledge, reduce stigma, and…

Medical Coder Day is an annual recognition dedicated to the professionals who translate clinical documentation into standardized codes used for billing, statistics, and continuity of care. It is observed by hospitals, clinics, billing companies, and educational programs as a moment to spotlight the precision, compliance, and revenue integrity that certified coders provide. The day matters…