Arba'een is a Shia Muslim religious observance which is celebrated forty days after the Day of Ashura, falling on the 20th or 21st day of the Islamic month of Safar. It commemorates the martyrdom of Muhammad's grandson Husayn ibn Ali. Arba'een is a public holiday in Iran.
Transgender Day of Remembrance is observed on November 20 every year. It was established to honor the memory of those who have been killed as a result of transphobia and to raise awareness of the continued violence against transgenders.
Universal Children's Day is a United Nations observance that was first proclaimed by the UN General Assembly in 1954. It is celebrated on November 20. This date marks the day on which the Declaration of the Rights of the Child was adopted in 1959.
The United Nations General Assembly declared the third Sunday in November to be World Day of Remembrance for Road Traffic Victims. This intentional observance exists from 1993.
Africa Industrialization Day is a United Nations observance held on November 20. It was officially established in 1989 by the UN General Assembly within the framework of the Second Industrial Development Decade for Africa and has been celebrated every year ever since.