Doug the Pug

Doug the Pug Day (Nashville, Tennessee)

World Metrology Day

World Metrology Day

World Bee Day

World Bee Day

National Day (Cameroon)

National Day (Cameroon)

Public holidays in Indonesia

National Awakening Day (Indonesia), and its related observances:
Indonesian Doctor Day (Indonesia)

Josephine Baker

Josephine Baker Day (NAACP)

European Maritime Day

European Maritime Day (European Council)

Emancipation Day

Emancipation Day (Florida)

National Day of Remembrance (Cambodia)

Day of Remembrance (Cambodia)

May 20 (Eastern Orthodox liturgics)

Christian feast day:
May 20 (Eastern Orthodox liturgics)

Saint Sanctan

Christian feast day:
Sanctan

Lucifer of Cagliari

Christian feast day:
Lucifer of Cagliari

Lydia of Thyatira

Christian feast day:
Lydia of Thyatira

Columba of Rieti

Christian feast day:
Columba of Rieti

Bernardino of Siena

Christian feast day:
Bernardino of Siena