Victory Day (Bangladesh)

Victory Day observances, celebration of the Indo-Bangla allied victory over Pakistan armed forces and the Liberation of Bangladesh. (Bangladesh and India[a])

Simbang Gabi

The beginning of the nine-day celebration beginning December 16 and ending December 24, celebrating the trials which Mary and Joseph endured before finding a place to stay where Jesus could be born (Hispanidad):
The first day of the Simbang Gabi novena of masses (Philippines)

Las Posadas

The beginning of the nine-day celebration beginning December 16 and ending December 24, celebrating the trials which Mary and Joseph endured before finding a place to stay where Jesus could be born (Hispanidad):
The first day of Las Posadas (Mexico, Latin America)

Public holidays in Thailand

National Sports Day (Thailand)

Day of Reconciliation

Day of Reconciliation, formerly celebrated as Day of the Vow by the Afrikaners (South Africa)

December 16 (Eastern Orthodox liturgics)

Christian feast day:
December 16 (Eastern Orthodox liturgics)

Ralph Adams Cram

Christian feast day:
Ralph Adams Cram, Richard Upjohn and John La Farge (Episcopal Church (USA))

Martyrs of Songkhon

Christian feast day:
Blessed Philip Siphong Onphitak

Marianna Fontanella

Christian feast day:
Blessed Marianna Fontanella

Haggai

Christian feast day:
Haggai

Adelaide of Italy

Christian feast day:
Adelaide of Italy

Lusanda Dumke

Lusanda Dumke, South African professional rugby union player who played as a flanker (born 1996)

Tulsi Gowda

Tulsi Gowda, Indian environmentalist (born 1937/1938)

Dick Van Arsdale

Dick Van Arsdale, American basketball player (born 1943)

Abundant Life Christian School shooting

The Abundant Life Christian School shooting in Madison, Wisconsin, United States, takes place, resulting in the death of three people.