Public holidays in Egypt

Victory Day (Egypt)

Tom Bawcock's Eve

Tom Bawcock's Eve (Mousehole, Cornwall)

Tibb's Eve

Tibb's Eve (Newfoundland and Labrador)

Night of the Radishes

Night of the Radishes (Oaxaca City, Mexico)

Charan Singh

Kisan Diwas (Uttar Pradesh, India)

HumanLight

HumanLight (Secular humanism in United States)

Festivus

Festivus, a secular holiday made popular by the sitcom Seinfeld

Armed Forces of Ukraine

Day of all level operational control structures servicemen (Ukraine)

December 23 (Eastern Orthodox liturgics)

Christian Feast Day:
December 23 (Eastern Orthodox liturgics)

Victoria, Anatolia, and Audax

Christian Feast Day:
Victoria

Saint Thorlak

Christian Feast Day:
Thorlac Thorhallsson, patron saint of Iceland; The last day of preparations before Christmas.

Psote

Christian Feast Day:
Psote (Coptic Church)

O Antiphons

Christian Feast Day:
O Emmanuel

John Cantius

Christian Feast Day:
John Cantius

Dagobert II

Christian Feast Day:
Dagobert II