《旧唐书·本纪·卷二十》
八月三十日，皇上敕令： 三月二十三日为嘉会节，因已故皇帝仙驾升天，将要卜选灵柩安葬之地，魂魄既然已经在天际遨游，人间的节日就应当停止，按照旧例，嘉会节应当停止。 
辛酉，敕： 三月二十三日嘉会节。伏以大行皇帝仙驾上升，灵山将卜，神既游于天际，节宜辍于人间。准故事，嘉会节宜停。 
On the 30th of August, the Emperor ordered: The Jiayue Festival is on the 23rd of March. As the carriage of the late Emperor's spirit has reached heaven, and because his soul now roams in the heavens, human festivals should be suspended. According to old custom, the Jiayue Festival should be suspended.