(Since the accession of Emperor Mommu, August 1st was dated differently, with Ganka reki used in "Nihonshoki" and Giho reki in "Shoku Nihongi" (Chronicle of Japan Continued), which makes it appear that there are two theories on the dates, but they were actually identical.)
（文武天皇の即位期日（八月朔日＝8月1日）の干支を『日本書紀』は元嘉暦、『続日本紀』は儀鳳暦で表記しているためにあたかも2説あるようにも見えるが、実際には同日であった）。