The eighth is the easy half of the name. La, the twelfth month, is named for a
sacrifice, and the sacrifice is older than the date. The Shuowen Jiezi, the
dictionary finished around 100 CE, defines la as "the sacrifice to all the gods, on the
third xu day after the winter solstice." Read that again: not the eighth of anything,
but a day counted on the sixty-day cycle from the solstice, which means it moved from
year to year, a great year-end feast for every spirit at once at which the leftovers,
presumably, were considerable. Cai Yong, a Han scholar, listed what each dynasty had
called it: jiaping under the Xia, qingsi under the Shang, the great zha under the Zhou,
and la under the Han. The same word gives Chinese its name for cured winter meats,
làròu, which is what you did with a pig in the La month.
By the sixth century the moving feast had a fixed address. The Jingchu
Suishiji, an almanac of the middle Yangzi written by Zong Lin, states flatly
that "the eighth day of the twelfth month is La day," and then describes what it looked
like in a village: the proverb "when the La drum sounds, the spring grass grows,"
and the villagers tying on waisted drums, putting on "Hu-gong heads," a kind of
mask, dressing as the Buddhist guardian giants, and going out to drum the
plague out of the settlement before bathing to wash off the year's sins. That is the
festival before it had a porridge: noise, masks and disinfection at the turn of the
year, the same instinct that gives you firecrackers three weeks later.
The porridge was already lurking a few weeks earlier in the same almanac. At the winter
solstice, Zong Lin says, people made a red-bean congee "to ward off plague," and he
explains why: a son of the god Gonggong, a wastrel, died on the solstice and became a
plague ghost, and the ghost is afraid of red beans. A warm bowl of beans against
midwinter sickness, then, was there in the sixth century, on a different day, for a
different reason, waiting for a better story.