Public holidays in Thailand

National Science Day (Thailand)

Battle of Long Tan

Long Tan Day, also called Vietnam Veterans' Day (Australia)

Public holidays in Indonesia

Constitution Day (Indonesia)

Virginia Dare

Birthday of Virginia Dare (Roanoke Island)

Armed Forces Day

Armed Forces Day (North Macedonia)

Arbor Day

Arbor Day (Pakistan)

August 18 (Eastern Orthodox liturgics)

Christian feast day:
August 18 (Eastern Orthodox liturgics)

Helena, mother of Constantine I

Christian feast day:
Helena of Constantinople (Roman Catholic Church)

Florus and Laurus

Christian feast day:
Florus and Laurus

Saint Fiacre

Christian feast day:
Fiacre

Saint Inan

Christian feast day:
Evan (or Inan)

Daig

Christian feast day:
Daig of Inniskeen

Alberto Hurtado

Christian feast day:
Alberto Hurtado

Agapitus of Palestrina

Christian feast day:
Agapitus of Palestrina

Phil Donahue

Phil Donahue, American talk show host and producer (born 1935)