Read down the date column and something odd shows up. Chinese New Year lands on
February 17 one year and
February 6 the next, and every
festival below it slides with it. Qingming and the Winter Solstice do not slide. They
sit within a day of April 5 and December 21 every year of your life, which is a strange
thing for two dates on the same calendar to do, until you know that the Chinese calendar
is really two instruments bolted together.
The first instrument is the moon. A month begins on the new moon and runs until the next
one, which takes about 29 and a half days, so months alternate between 29 and 30 and a
year of twelve comes up around eleven days short of the sun. Left alone, the festivals
would walk backward through the seasons the way Ramadan does. The calendar refuses to
let that happen, and every two or three years it inserts an entire extra month to drag
the year back into line. Every festival that sits on a lunar date, which is seven of the
nine here, gets carried along in that lurch. It never moves on the Chinese calendar. It
only ever moves on yours.
The second instrument is the sun. The year is also cut into 24 solar
terms, points on the sun's path that fall on nearly the same western date every
time. Two of those points grew festivals of their own. Qingming, the fifth term, comes
fifteen days after the spring equinox and is the day families clean the graves. The
Winter Solstice, the twenty-second, is the longest night and was once so important that
the Zhou dynasty began its year there. Neither has a lunar date at all, which is why
Qingming is the one famous festival you will never find in our converter's
month table, and why the
rows above mark them separately. Same book, different page of it.