February 15, 2027 brings World Hippo Day — one of winter's more delightful excuses to celebrate.

Mark your calendar: February 15, 2026 is World Hippo Day.

Did you know April 17, 2027 is World Hemophilia Day?

World Hemophilia Day is celebrated on April 17, 2026.

On March 3, 2027, World Hearing Day puts the spotlight on something that matters.

Mark March 3, 2026 for World Hearing Day.

Mark May 5, 2027 for World Hand Hygiene Day.

This spring, World Hand Hygiene Day on May 5, 2026 asks for your attention.

It's World Greatness Day on August 15, 2027.

World Greatness Day is celebrated on August 15, 2026.