| October 1 |
International Day of Older Persons |
UN[13][198] |
| October 1 |
World Vegetarian Day |
|
| October 1 |
International Coffee Day |
|
| October 2 |
International Day of Non-Violence |
UN[13][199] |
| October 2 |
World Cerebral Palsy Day |
|
| First Monday in October |
World Habitat Day |
|
| First Friday in October |
World Smile Day[200] |
|
| October 2 |
Gandhi Jayanthi |
|
| October 2 |
Produce Misting Day |
|
| October 3 |
German Unity Day |
|
| October 3 |
Stevie Ray Vaughan Day (Austin, Texas, US) |
|
| October 4 |
World Animal Day |
|
| October 4 |
Cinnamon roll day |
Sweden |
| October 4 |
eDay |
Electronic Waste Awareness Day (New Zealand) |
| October 5 |
International Day of No Prostitution[201] |
|
| October 5 |
World Teachers' Day |
UN, UNESCO[13][202] |
| October 6 |
German-American Day |
|
| October 6 |
National Poetry Day (Britain) |
|
| Second Saturday in October |
International Migratory Bird Day |
South America |
| October 9 |
World Post Day |
UN[13][203] |
| October 10 |
World Mental Health Day |
UN, WHO[13][204] |
| October 10 |
World Day Against the Death Penalty |
|
| October 10 |
Fiji Day (Fiji) |
|
| October 11 |
International Day of the Girl Child |
UN[13][205] |
| October 11 |
World Obesity Day |
|
| October 11 |
National Coming Out Day |
|
| October 12 |
World Sight Day |
|
| October 12 |
Columbus Day |
Celebrated in Spain, US, and Latin American countries |
| October 12 |
Spain National Day |
|
| October 13 |
World Thrombosis Day |
International Society on Thrombosis and Haemostasis World Thrombosis Day[206] |
| October 13 |
International Day for Disaster Reduction |
UN[13][207] |
| October 14 |
World Standards Day |
|
| October 15 |
Global Handwashing Day |
|
| October 15 |
White Cane Safety Day |
|
| October 15 |
Pregnancy and Infant Loss Remembrance Day |
|
| October 16 |
National Boss Day (Boss's Day) |
|
| October 16 |
World Anaesthesia Day |
WFSA[208] |
| October 16 |
World Food Day |
|
| October 17 |
International Day for the Eradication of Poverty |
UN[13][209] |
| October 18 |
World Vasectomy Day[210] |
|
| October 20 |
World Osteoporosis Day[211] |
|
| October 20 |
World Statistics Day |
|
| October 21 |
International Day of the Nacho |
|
| October 21 (2015 only) |
Back to the Future Day |
|
| October 21 |
Trafalgar Day (United Kingdom) |
|
| October 22 |
International Stuttering Awareness Day |
|
| October 22 (also June 28) |
CAPS LOCK DAY |
|
| October 23 |
International Cyrus The Great Memorial Day[212][13] |
UN,[13] IR |
| October 23 |
Mole Day |
|
| October 23 |
Brazilian Air Force Day |
|
| October 24 |
United Nations Day |
UN[13][213] |
| October 24 |
World Development Information Day |
UN[13][214] |
| October 26 |
Intersex Awareness Day |
|
| Fourth Monday in October |
Labour Day (New Zealand) |
|
| October 27 |
World Day for Audiovisual Heritage |
UN, UNESCO[13][215] |
| October 28 |
International Animation Day |
|
| October 29 |
World Stroke Day |
|
| October 29 |
National Cat Day (USA) |
|
| October 30 |
Mischief Night |
|
| 1st Mon in Oct |
World Habitat Day |
UN[13][216] |
| Day in 1st week in Oct |
World Ballet Day |
|
| 2nd Thu in Oct |
World Sight Day |
UN, WHO,[13][217] IAPB[218] |
| October 31 |
Reformation Day |
|
| October 31 |
World Cities Day |
|
