Lin'an (1162) — the same event in History of Song and Xu Zizhi Tongjian

History of Song: Emperor Xiaozong ascended the throne and offered the honorary title of Retired Emperor to Gaozong.; Xu Zizhi Tongjian: On the sixth…

What each source says

History of Song (Songshi), Annals · AD 1162 · 臨安

Emperor Xiaozong ascended the throne and offered the honorary title of Retired Emperor to Gaozong.

孝宗即位，累上尊號曰光堯壽聖憲天體道性仁誠德經武緯文紹業興統明謨盛烈太上皇帝。
Location: 宋史卷032 紹興三十二年

Xu Zizhi Tongjian (Continuation of the Comprehensive Mirror) · AD 1162 · 臨安

On the sixth month, bingzi, Gaozong performed the rite of abdication (neixuan) and set up the honor guard below the Zishen Hall.

丙子，帝行內禪之禮，有司設仗紫宸殿下
Location: 권137 六月 단락137.44.0

Place: 臨安

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