Welcome to the Lunar Chinese New Year and the Year of the Dragon.

lunar calendar 2012
In China, the event is known as the Spring Festival (chunjie). In Southeast Asia where a holiday to mark the start of spring doesn’t make much sense, the two common names for the occasion are “Chinese New Year” and “Lunar New Year”.
But the latter term, it turns out, is neither accurate nor desirable.
“Lunar New Year” not accurate?
Contrary to popular belief, what the Chinese use is not a lunar calendar at all. An explanation of various calendar types will show why.
For thousands of years, human societies have relied on the sun or the moon, or a combination of both, to keep track of days, months and years.
Solar Calendars based on earth’s revolution around the sun.
Solar calendars are based on the revolution of the earth around the sun and totally disregard the moon. A year in such a calendar usually has 365 days, because the earth takes approximately that duration to go around the sun; leap days are added at certain intervals to make the synchronisation more exact. A clear advantage of such a calendar is that, in temperate lands, each of the four seasons generally occurs at the same time every year.
Gregorian calendar best-known solar calendar.
The Gregorian calendar, which is used in civil society, is the best-known solar calendar. Many Hindu calendars are solar too – for example, the recent Tamil harvest festival Pongal is celebrated around Jan 15 every year.
Lunar calendar: Islamic Calendar the only one.
Lunar calendars, on the other hand, ignore the movement of the earth around the sun, and instead use the revolution of the moon around the earth to mark months – the words “moon” and “month” are closely related. The moon takes about 291/2 days to go around the earth, so a month in a lunar calendar comprises 29 or 30 days. Twelve such months – adding up to 354 or 355 days – make up a lunar year, which makes it shorter than a solar year.
The Islamic calendar is the only lunar calendar in common use. Its shorter year explains why the dates of festivals such as Hari Raya Aidilfitri move backwards by 10 or 11 days from one year to the next.
Jewish calendar is a lunisolar calendar.
Between these two extremes lie lunisolar calendars, which take their cue from both the sun and the moon. The Jewish calendar is of this nature.
Christian liturgical calendar a combination of solar and lunisolar.….
And then there are calendars that combine two cycles, one solar and one lunisolar. The Christian liturgical calendar is one such example. Festivals such as Christmas follow the solar year and always occur on the same dates. But the date of Easter changes from year to year because it is determined by a lunisolar calculation – it falls on the Sunday following the first full moon (this is the lunar aspect) that occurs on or after the March equinox (the solar aspect: on this date, March 21, the day and night are of equal lengths).
…. as well as the Chinese calendar.
In a similar way, the Chinese calendar is a combination of a solar calendar and a lunisolar one, explains Associate Professor Helmer Aslaksen of the National University of Singapore’s Mathematics Department, in his 2010 paper The Mathematics Of The Chinese Calendar.
The solar cycle starts at the winter solstice (dongzhi, around Dec 22) and follows the 24 solar terms (jieqi), which are seasonal markers meant to guide farmers in their work – the moon is of no help to planting and harvesting, and agriculture has to rely on the seasons. Besides the winter solstice, another significant jieqi is Qingming (around April 5), which many Chinese celebrate as Tomb-Sweeping Day.
The lunisolar cycle begins at Chinese New Year. It calculates months according to the phases of the moon (this is its lunar aspect), but a leap month is inserted every two or three years to bring the calendar in sync with the solar year.
Expression “Lunar New Year” is inaccurate.
This insertion of leap months is why, unlike Muslim festivals, the date of Chinese New Year always stays within a certain period – Jan 21 to Feb 21. In fact, the calculation of this date involves both lunar and solar aspects: it must occur on the day of a new moon, of course, but not just any new moon – it is the new moon closest to Feb 4, which is the day of lichun, the solar term that marks the beginning of spring.
This explains why the expression “Lunar New Year” is inaccurate…..
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