In the Gregorian calendar, New Year's Day is the first day of the calendar year, 1 January.

Many Jewish people in the United States mark the last day of Hanukkah as the end of the Hanukkah celebrations. Hanukkah, also known as the Festival of Lights, is an eight-day Jewish observance to commemorate the Jewish people's struggle for religious freedom.

National Human Trafficking Awareness Day on January 11th brings attention to a crime that leaves a lasting toll on human life, families, and communities around the world

It's a day dedicated to recognizing the invaluable contributions of pharmacists in the United States. These medication marvels go far beyond filling prescriptions. They ensure medications we rely on are safe and efficient and offer crucial advice.

World Religion Day is an observance that was initiated in 1950 by the National Spiritual Assembly of the Baháʼís of the United States, which is celebrated worldwide on the third Sunday in January each year.

Martin Luther King Jr. Day is a federal holiday in the United States observed on the third Monday of January each year. King was chief spokesperson for nonviolent activism in the Civil Rights Movement, which protested racial discrimination in federal and state law and civil society.

National Hugging Day is an annual event dedicated to hugging in the United States. It was created by Kevin Zaborney, a Christian pastor, and occurs annually on January 21. The day was first celebrated in 1986, in Clio, Michigan. The holiday is also observed in many other countries.

World Religion Day is an observance that was initiated in 1950 by the National Spiritual Assembly of the Baháʼís of the United States, which is celebrated worldwide on the third Sunday in January each year.

Chinese New Year, or the Spring Festival, is a festival that celebrates the beginning of a new year on the traditional lunisolar Chinese calendar. Marking the end of winter and the beginning of spring, this festival takes place from Chinese New Year's Eve to the Lantern Festival, held on the 15th day of the year.

Each year on January 31st, National Hot Chocolate Day warms up people across the country by celebrating the timeless cold-weather beverage.

National Wear Red Day is a day in February when many people wear red to show their support for the awareness of heart disease.

World Cancer Day is an international day marked on 4 February to raise awareness of cancer and to encourage its prevention, detection, and treatment. World Cancer Day is led by the Union for International Cancer Control to support the goals of the World Cancer Declaration, written in 2008.