Monday
April 18
15 holidays and observances fall on this day.
International Jugglers Day
Celebrate International Jugglers Day by exploring the art of juggling, attending workshops, and connecting with the global juggling community.
International Day for Monuments and Sites
International Day for Monuments and Sites is a global observance held on April 18 to promote the conservation of cultural heritage.
World Amateur Radio Day
World Amateur Radio Day is held on April 18 to celebrate the founding of the IARU and the global ham radio community.
Boston Marathon
The Boston Marathon is a world-renowned road race held on the third Monday of April to celebrate athletic endurance.
Superman Day
Superman Day is observed on April 18 to celebrate the Man of Steel, comic book history, and heroic storytelling.
Adult Autism Awareness Day
Adult Autism Awareness Day is observed on April 18 to highlight the experiences and needs of autistic individuals throughout their adult lives.
Piñata Day
Celebrate Piñata Day on April 18th by embracing the colorful tradition of piñatas, symbolizing joy, community, and cultural heritage.
National Exercise Day
National Exercise Day is observed on April 18 to encourage physical activity and raise awareness of health benefits.
National Velociraptor Awareness Day
National Velociraptor Awareness Day is an educational holiday held on April 18 to explore the true science of the famous dinosaur.
Linemen Appreciation Day
Linemen Appreciation Day is held on April 18 to honor the electrical workers who maintain the power grid in dangerous conditions.
National Animal Crackers Day
National Animal Crackers Day is a fun food holiday held on April 18 to celebrate the classic animal-shaped snack.
Pet Owners Independence Day
Pet Owners Independence Day is a humorous holiday observed on April 18 where owners pretend to switch places with their pets.
National Newspaper Columnists Day
National Newspaper Columnists Day is observed on April 18 to honor the contributions of columnists and remember Ernie Pyle.
Independence Day in Zimbabwe
Independence Day in Zimbabwe is observed on April 18 to mark the nation's 1980 liberation from British colonial rule.
Invention Day in Japan
Invention Day in Japan is observed on April 18 to commemorate the establishment of the national patent system.
Coming up next
Bicycle Day
Bicycle Day marks the anniversary of Albert Hofmann's first intentional LSD trip in 1943, highlighting a significant event in psychedelic history.
Congenital Diaphragmatic Hernia Action Day
Congenital Diaphragmatic Hernia Action Day is held on April 19 to raise awareness and support for children born with CDH.
Dutch-American Friendship Day
Dutch-American Friendship Day is observed on April 19 to celebrate the long-standing diplomatic ties between the two nations.
National Cat Lady Day
National Cat Lady Day is observed on April 19 to celebrate the bond between women and cats and to break down negative stereotypes.
National Garlic Day
National Garlic Day honors the bold flavor and health benefits of garlic with delicious dishes and a nod to its rich cultural history.
Humorous Day
Humorous Day is an annual observance held on April 19 to promote the therapeutic power and joy of laughter.
National Poker Day
National Poker Day is a global celebration held on April 19 to honor the strategy and community of the world's most popular card game.
National Dog Parent Appreciation Day
National Dog Parent Appreciation Day is observed on April 19 to celebrate the dedicated people who provide loving homes for their canine companions.
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