Day of the Ninja
Day of the Ninja is held on December 5. Unofficial. This event in the first decade of the month december is annual.
Farmer's Day in Ghana on December 4 (Date for 2020; celebrated on the first Friday in December);
Miner's Day in Poland on December 4 (Barbórka);
Cuban Builder Day on December 5 (Día del Constructor);
National Police Day in Peru on December 6 (Día de la Policía Nacional);
National Speaker's Day in Guatemala on December 7 (Día Nacional del Locutor has been celebrated since 1978)