Christmas Eve in the United States, which is annually on December 24, is the day before Christmas Day falling in the Christmas season   Alpine Offices will be closed.

Many people in the United States celebrate Christmas Day on December 25. The day celebrates Jesus Christ's birth. It is often combined with customs from pre-Christian winter celebrations. Many people erect Christmas trees, decorate their homes, visit family or friends and exchange gifts.   Alpine offices will be closed

Kwanzaa is a week-long holiday honoring African culture and traditions. It falls between December 26 and January 1 each year. Maulana Karenga, an African-American leader, proposed this observance and it was first celebrated between December 1966 and January 1967.

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.