International Day for the Protecting Men's Nervous System From Women's Violence

International Day of the Nacho on October 21 (nachos first appeared in 1943 in Piedras Negras, a small Mexican city which is very near to the U.S. military base Fort Duncan, in Texas);

Global Iodine Deficiency Disorder Prevention Day or World Iodine Deficiency Day on October 21;

International Day of Culture for Concord and Peace on October 21 (organized by Aljabart Charitable Foundation);

Pharmacy Technician Day on October 21 (PTDay was first endorsed by Pharmacy Technician Educators Association, American Association of Pharmacy Technicians, Inc. – AAPT and Pharmacy Technician Certification Board in 2015. It has been observed the third Tuesday in October since 1991);

National Dental Hygiene Day in Thailand on October 21;

Babbling Day on October 21;

Count Your Buttons Day on October 21;

Lionfish Spearing in Belize on October 21 (Marine conservation holidays, September to May);

International Caps Lock Day on October 22;

Fechner Day on October 22 (International observance);

Sustainability Day on October 22 (The goal is to be able to take care of the planet for a very long time. Held on the fourth Wednesday in October);

World Traditional Medicine Day on October 22;

International Mole Day on October 23;

International Snow Leopard Day on October 23;

International Kabuki Syndrome Day on October 23;

Global Day of Action for Child Survival on October 23;

Doctor's Day in Mexico on October 23 (Día del médico);

National Red Ribbon Week in USA on October 23 (is the oldest and largest drug prevention program in the nation reaching millions of young people);

Bavarian Dentists' Day on October 23 (Beginning on Thursday of the fourth week of October);

Mole Day on October 23 (is an holiday celebrated among chemists);

iPod Day on October 23 (The first iPod was sold on November 10th, 2001, and the world has never been the same);

Earth Creation Day on October 23;

Tv Talk Show Host Day on October 23;