As the CGC was invented in ancient China, it is
not surprising that both age and month required by the chart should be calculated from the Chinese lunar calendar. There are some people argue that Gregorian (western) calendar should be used. Think about the chart has several hundreds years of history
, and the Gregorian calendar was not adopted by China till early 20th century, therefore the argument is simply not valid.
What is Lunar Calendar?
A lunar calendar (aka Chinese calendar) is actually a calendar whose
date indicates the moon phase. Lunar months
are determined by the period required for the
moon to complete its full phasic cycle of
29 and a half days, a standard that makes
the lunar year a full 11 days shorter than
its solar counterpart. This difference is
made up every 19 years by the addition of
seven lunar months, which is called leap month
. For more detail about the Chinese Lunar Calendar, please click
How to convert Gregorian
Calendar to Chinese Lunar Calendar?
The easiest way for Gregorian-Lunar conversion is using the Gregorian-Lunar converter
(for Internet Explorer only). If you want to do it manually, you can use the Gregorian-Lunar Calendar Conversion Tables
, provided by Hong Kong Sky Observatory.