World Breast Cancer Research Day
World Breast Cancer Research Day is observed on August 18—discover how the day began, why research matters, and realistic ways anyone can support progress.
Tuesday
What holiday is on August 18?
11 holidays and observances fall on August 18.
National Bad Poetry Day
Celebrate National Bad Poetry Day on August 18 by writing terrible poetry. Embrace imperfection and have fun with words. It's a day to laugh and be
Pinot Noir Day
Pinot Noir Day on August 18 celebrates one of the world's most elegant red wines. Learn its history, importance, and how to enjoy this versatile grape.
Never Give Up Day
Never Give Up Day is celebrated on August 18 — discover why perseverance deserves a holiday and practical ways to encourage yourself and others.
National Ice Cream Pie Day
National Ice Cream Pie Day — discover why this easy freezer dessert brings people together and practical tips for making or sharing a perfect slice.
National Couple's Day
National Couple's Day on August 18 celebrates love and partnership. Learn about its history, importance, and fun ways to honor your relationship.
Serendipity Day
Serendipity Day on August 18 celebrates unexpected joys. Learn how to appreciate life's happy accidents with history, importance, and celebration ideas.
National Fajita Day
Celebrate National Fajita Day on August 18! Discover the history of this sizzling Tex-Mex dish and fun ways to enjoy it with family and friends.
National Mail Order Catalog Day
National Mail Order Catalog Day on August 18 celebrates the history of mail order shopping, honoring Montgomery Ward’s 1872 catalog and its impact on
Indonesia Constitution Day
Indonesia Constitution Day on August 18 honors the 1945 Constitution. Discover its history, importance, and ways to celebrate this national observance.
Long Tan Day
Long Tan Day on August 18 honors Australian and New Zealand soldiers who fought in the 1966 Battle of Long Tan. Learn its history and how to observe.
Coming up next
World Photography Day
World Photography Day is inviting everyone to share images and honor the art, craft, and history of photography with simple, meaningful ways to participate.
World Humanitarian Day
World Humanitarian Day honors aid workers and victims of humanitarian crises every August 19.
International Orangutan Day
International Orangutan Day is marked every August 19 to spotlight orangutan conservation and rainforest protection, with simple, practical ways anyone can help from home.
International Bow Day
International Bow Day on August 19 celebrates the bow as a timeless fashion accessory. Discover its history, importance, and how to celebrate.
National Potato Day
National Potato Day is celebrated on August 19—discover its background, why this humble staple matters, and easy, crowd-pleasing ways to join the fun.
National Photography Day
National Photography Day celebrates the art, craft, and history of pictures with easy ways to join in, from simple photo projects to sharing your favorite shots.
National Aviation Day
National Aviation Day on August 19 honors Orville Wright and the history of flight. Celebrate with museum visits, documentaries, and model planes. Explore
National Soft Ice Cream Day
National Soft Ice Cream Day on August 19 celebrates the creamy, swirled treat loved by all. Discover its history, importance, and fun ways to enjoy soft
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