October 20, 2026 brings World CRISPR Day — one of fall's more delightful excuses to celebrate.

World COPD Day is celebrated on November 17, 2027.

It's World COPD Day on November 18, 2026.

World Computer Literacy Day lands on December 2, 2027.

World Computer Literacy Day lands on December 2, 2026.

World Cities Day is celebrated on October 31, 2027.

It's World Cholangiocarcinoma Day on February 18, 2027.

World Cholangiocarcinoma Day is celebrated on February 18, 2026.