(14 Xinhai twelfth lunar month), February 3, 1852, the Taiping Feng Yunshan create the halcyon days of the calendar.

1852, the Taiping Yongan formally enacted Feng Yunshan created the "halcyon days in prison calendar. "Calendar days" each year for 366 days, a single month 31 days bimonthly 30 days, 4 years difference three days. No leap year, did not mention the leap month, excluding the synodic twelve on January first of each month, mid 12 gas placed each month. With the Taiping name era Ganzhi Annals, month, and day. But "ugly" and "d" "Hai" to "good" and "Wing" open ". Fortune fortunes Taboo week sequential imitation Sifa, and delete old calendar book. Day calendar "Although the data is not accurate enough, but its enactment is a blatant denial of the the Qing" Zhengshuo ", declared a complete break with the dynasty played a huge role in political agitation in the early struggle in the Taiping Heavenly Kingdom.