International Menopause Society

World Menopause Day

Persons Day

Persons Day (Canada)

Necktie

Necktie Day (Croatia)

October 18 (Eastern Orthodox liturgics)

Christian feast day:
October 18 (Eastern Orthodox liturgics)

Peter of Alcántara

Christian feast day:
Peter of Alcantara, can also be celebrated on October 19.

Luke the Evangelist

Christian feast day:
Luke the Evangelist

Isaac Jogues

Christian feast day:
Isaac Jogues

Asclepiades of Antioch

Christian feast day:
Asclepiades of Antioch

Alaska Day

Alaska Day (Alaska, United States)

Suicide of Lia Smith

Lia Smith, American diver and transgender rights advocate.

Yang Chen-Ning

Yang Chen-Ning, Chinese theoretical physicist (born 1922)

Sam Rivers (bassist)

Sam Rivers, American bassist (born 1977)

Ginés González García

Ginés González García, Argentine politician and physician (born 1945)

Yehuda Bauer

Yehuda Bauer, Israeli historian of the Holocaust (born 1926)