The third paragraph of the first chapter in Romance of the Three Kingdoms (translation by R. Moss), states:
On the fifteenth day of the fourth month of the second year of the reign Established Calm [Jian Ning A.D. 169], the Emperor arrived at the Great Hall of Benign Virtue for the full-moon ancestral rites.
What is "Established Calm"? Is that a euphemism for the beginning of emperor Ling of Han's reign? What is the Great Hall of Benign Virtue? And what are the full-moon ancestral rites?