Armed Forces of Ukraine

Signal Troops Day (Ukraine)

Nane Nane Day

Nane Nane Day (Tanzania)

Flag flying days in Sweden

Namesday of the Queen (Sweden)

International Cat Day

International Cat Day

Secret Society of Happy People

Happiness Happens Day

Father's Day

Father's Day or Bā bā Day (爸爸節), Bā Bā is Mandarin for "father" and "8-8", or August 8. (Mongolia, Taiwan)

August 8 (Eastern Orthodox liturgics)

Christian Feast Day:
August 8 (Eastern Orthodox liturgics)

Severus of Vienne

Christian Feast Day:
Severus of Vienne

Smaragdus (name)

Christian Feast Day:
Saint Smaragdus (and companions)

Mary MacKillop

Christian Feast Day:
Mary MacKillop

Cyriacus

Christian Feast Day:
Largus

Four Crowned Martyrs

Christian Feast Day:
Four Crowned Martyrs

Saint Dominic

Christian Feast Day:
Dominic de Guzmán, founder of the Dominican Order.

Cyriacus

Christian Feast Day:
Cyriacus

Altmann (bishop of Passau)

Christian Feast Day:
Altmann of Passau