釋氏要覽 3.434

3.434

二月十五日佛涅槃日。天下僧俗有營會供養。即忌日之事也。俗禮君子育終身之孝。忌日之謂也。又謂不樂之日。不飲樂故。或云。諱日。或云。遠日（遠日。猶濫曲禮葬事先遠日）釋子師亡。可稱歸寂之日。蓋釋氏無忌諱故。

On the fifteenth day of the second month, the day of the Buddha's nirvāṇa, monastics and laypeople throughout the realm organize gatherings and make offerings; this is the matter of a memorial day. In secular rites, a gentleman cultivates lifelong filial piety, which refers to the memorial day. It is also called the "day of displeasure," because one does not drink or make merry. Some call it the "taboo day" (*huiri*); some call it the "distant day" (*yuanri*). (Calling it "distant day" still confuses it with the *Quli*'s 'funeral matters first choose a distant day'.) When a Śākya disciple's master dies, it may be called the "day of returning to extinction," because the Śākyas have no taboos.