Literary or formal term for the first day of a month; in modern Japanese 一日 (ついたち) is far more common.
character sketch; commentary on personalities
Abbreviation of 月旦評 (げったんひょう); a classical Chinese-derived term for evaluating people's character. Rare in modern Japanese outside historical or literary contexts.
See also: 月旦評
There is a custom of visiting a shrine on the first day of the month.
He was good at character sketches.
From Chinese 月旦 (yuèdàn), originally referring to the first day of the month, later extended to mean a monthly character assessment. The Japanese reading is げったん.