In the last year of B, the Mid-winter Book XX(/ Zhengdong).
December's nickname is:
Ice moon, tai sui, remnant winter, pale winter, ugly moon, migration, migration of the moon, big wax, Dalu, the first month of the earth, dry moon, remnant winter, late winter, winter wax, late winter, winter element, Er Yang, February, cold winter, Han wax. Old age, twilight sequence, naphthalene month, year edge, year end, year end, year end, dying month, parent-child month, Qing dynasty, poor winter, poor discipline, poor law, poor day, poor yin, poor month, poor March and August.