Chinese New Year is the most important of the traditional Chinese holidays. It is sometimes called the Lunar New Year, especially by people outside China or other Asian countries. The festival traditionally begins on the first day of the first lunar month ( ) in the Chinese calendar and ends on the 15th; this day is called Lantern Festival. Chinese New Year's Eve is known as Chúxī (除夕, abbr. for 年除夕 Niánchúxī, Chúxì in Taiwan). It literally means "Year-pass Eve".

Celebrated in areas with large populations of ethnic Chinese, Chinese New Year is considered a major holiday for the Chinese and has had a strong influence on the new year celebrations of its geographic neighbours, as well as cultures with whom the Chinese have had extensive interaction . These include Koreans, Mongolians, Nepalese, Bhutanese, Vietnamese, and formerly the Japanese before 1873. In Singapore, Indonesia, Malaysia, the Philippines, Thailand, and other countries with significant Chinese populations, Chinese New Year is also celebrated, largely by overseas Chinese, but it is not part of the traditional culture of these countries. In Canada, although Chinese New Year is not an official holiday, many ethnic Chinese hold large celebrations and Canada Post issues New Year's themed stamps in domestic and international rates.

Although the Chinese calendar traditionally did not use continuously numbered years, its years are now often numbered from the reign of Huangdi outside China. But at least three different years numbered 1 are now used by various writers, causing the year beginning in 2008 to be 4706, 4705, or 4645.

New Year dates

The lunisolar Chinese calendar determines Chinese New Year dates. The calendar is also used in countries that have adopted or have been influenced by Han culture (notably the Koreans, Japanese and Vietnamese) and may have a common ancestry with the similar New Years festivals outside East Asia (such as Iran, and historically, the Bulgars lands).

In the Gregorian calendar, Chinese New Year falls on different dates each year, a date between January 21 and February 20. This means that the holiday usually falls on the second (very rarely third) new moon after the winter solstice. In traditional Chinese Culture, lichun is a solar term marking the start of spring, which occurs about February 4.

The dates for Chinese New Year from 1996 to 2019 (in the Gregorian calendar) are at the right, along with the year's presiding animal zodiac and its earthly branch. The names of the earthly branches have no English counterparts and are not the Chinese translations of the animals. Alongside the 12-year cycle of the animal zodiac there is a 10-year cycle of heavenly stems. Each of the ten heavenly stems is associated with one of the five elements of Chinese astrology, namely: Wood, Fire, Earth, Metal, and Water. The elements are rotated every two years while a yin and yang association alternates every year. The elements are thus distinguished: Yang Wood, Yin Wood, Yang Fire, Yin Fire, etc. These produce a combined cycle that repeats every 60 years. For example, the year of the Yang Fire Rat occurred in 1936 and in 1996, 60 years apart.