New Year's Day falls on January 1 and marks the start of a new year according to the Gregorian calendar. It marks the end of New Year's Eve celebrations in the United States and gives many Americans a chance to remember the previous year.

Inauguration Day occurs in the USA once every four years on January 20. It occurs in the year after presidential elections have been held. The new terms of office of the president and vice-president officially begin at noon in Washington DC.

There are two equinoxes every year – in March and September – when the Sun shines directly on the equator and the length of night and day are nearly equal.

Many people in the United States observe Yom Hashoah, which is also known as Holocaust Remembrance Day. It commemorates the lives and heroism of Jewish people who died in the Holocaust between 1933 and 1945.

Administrative Professionals Day highlights the important role of administrative professionals in all sectors of the modern economy worldwide. It is on the Wednesday of Administrative Professionals Week, which is on the last full week of April.

Ramadan (also known as Ramadhan or Ramzan) is the ninth month in the Islamic calendar. It is a period of prayer, fasting, charity-giving and self-accountability for Muslims in the United States. The first verses of the Koran (Qu'ran) were revealed to the Prophet Muhammad (also written as Mohammad or Muhammed) […]

D-Day is observed in the U.S. in memory of the Normandy landings in France on June 6, 1944, in which American soldiers and other Allied forces fought to end World War II in Europe.