Lunar, Solar, and Lunisolar Calendars

Depending on which calendar a society uses there are many different New Year’s and in some places more than one is celebrated. Calendars are generally one of three types: lunar, solar, or lunisolar. A lunar calendar is based on the revolution of the moon around the earth, a solar calendar is based on the revolution of the earth around the sun, and a lunisolar calendar is based on the moon’s revolution around the earth but includes a thirteenth month, aka leap month, every two or three years to keep it in sync with the earth’s revolution around the sun.

In lunisolar calendars like the Chinese calendar a leap month is periodically added so the months correspond with the seasons. It takes the moon around 29.5 days to revolve around the earth which means 12 lunar months is around 354 days and since it takes the earth around 365 days to revolve around the sun the months and seasons would drift apart around 11 days each year without this leap month. The New Year’s that takes place on January 1st is according to the Gregorian or Western calendar which is a solar calendar and the New Year’s that takes place today and every year on the new moon between late January and late February is according to the Chinese calendar.

Happy New Year! 新年快樂!

Sheen = new 新
Nee-en = year 年
Kwai Luh = happy 快樂

Sheen Nee-en Kwai Luh! Try it if you encounter a Chinese speaking person this week because unlike the Western New Year Chinese New Year, aka Spring Festival, is a multi-day mega holiday that doesn’t officially conclude until the 15th day which marks the first full moon of the new year and is celebrated as Lantern Festival.