Big Word Day
Big Word Day is observed annually on April 21. This holiday encourages people to expand their vocabularies by moving beyond common, everyday language to use more complex and precise terminology….
National Library Workers Day
National Library Workers Day is observed on the Tuesday of National Library Week. In 2026, it falls on April 21. This day is dedicated to recognizing the hard work, dedication,…
International Astronomy Day (Spring)
International Astronomy Day (Spring Astronomy Day) is observed on a Saturday between mid-April and mid-May on or near the first quarter Moon. In 2026, it falls on April 25. This…
Tuna Rights Day
Tuna Rights Day is observed annually on April 21. This day focuses on the environmental and ethical issues surrounding the global tuna industry, specifically emphasizing the need for sustainable fishing…
Thank You for Libraries Day
Thank You for Libraries Day is observed annually on April 21. This holiday serves as a dedicated time for patrons and communities to express their gratitude for the resources, sanctuary,…
Rome Foundation Day
Rome Foundation Day, also known as Natale di Roma, is observed annually on April 21. This secular holiday celebrates the legendary founding of the Eternal City in 753 BC by…
National Yellow Bat Day
National Yellow Bat Day is observed annually on April 21. This military-themed holiday honors the history and contributions of the 265th Army Security Agency (ASA) Company, an airborne unit that…
National Tea Day
National Tea Day is observed annually on April 21. This holiday celebrates the cultural importance of tea and encourages people to share a cup with others. While tea is a…
National Surprise Drug Test Day
National Surprise Drug Test Day is observed annually on April 21. This unofficial holiday serves as a counter-celebration to the cannabis-related festivities of the previous day, focusing on the importance…
National Pet CBD Day
National Pet CBD Day is observed annually on April 21. This holiday is dedicated to educating pet owners about the potential wellness benefits and safe usage of hemp-derived cannabidiol for…