Halloween's origins can be traced back to the ancient Celtic festival known as Samhain, which was held on November 1 in contemporary calendars. It was believed that on that day, the souls of the dead returned to their homes, so people dressed in costumes and lit bonfires to ward off spirits.

Samhain is a Gaelic festival marking the end of the harvest season and beginning of winter or "darker-half" of the year. It is held on 1 November but with celebrations beginning on the evening of 31 October, since the Celtic day began and ended at sunset.

Christmas is an annual festival commemorating the birth of Jesus Christ, observed primarily on December 25 as a religious and cultural celebration among billions of people around the world.

Kwanzaa is an annual celebration of African-American culture from December 26 to January 1, culminating in a communal feast called Karamu, usually on the sixth day. It was created by activist Maulana Karenga, based on African harvest festival traditions from various parts of West and Southeast Africa.

New Year's Day is a festival observed in most of the world on 1 January, the first day of the year in the modern Gregorian calendar.

It originated as a Christian feast day honoring one or two early Christian martyrs named Saint Valentine and, through later folk traditions, has become a significant cultural, religious, and commercial celebration of romance and love in many regions of the world.

International Transgender Day of Visibility is an annual event occurring on March 31 dedicated to celebrating transgender and non-binary people and raising awareness of discrimination faced by transgender people worldwide, as well as a celebration of their contributions to society.