Kaifeng (960) — the same event in History of Liao and Xu Zizhi Tongjian

History of Liao: Zhao Kuangyin, Later Zhou's Commander of Front and Rear, deposed the ruler and named his state Song.; Xu Zizhi Tongjian: In the…

What each source says

History of Liao (Liaoshi) · AD 960

Zhao Kuangyin, Later Zhou's Commander of Front and Rear, deposed the ruler and named his state Song.

十年春正月，周殿前都點檢趙匡胤廢周自立，建國號宋。
Location: 遼史卷6 應歷10年 1月

Xu Zizhi Tongjian (Continuation of the Comprehensive Mirror) · AD 960 · 開封

In the first month of spring, on the day yisi, Zhao Kuangyin, military governor of Guide, grand tutor on acting duty, and inspector-general of the palace guard under Later Zhou, proclaims himself emperor.

春，正月，乙巳，周歸德軍節度使、檢校太尉、殿前都點檢趙匡胤稱帝。
Location: 續資治通鑑卷001 (960년 조)

Place: 開封

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