Rare word for an auspicious day or a day for celebration. Often used in contexts like traditional calendars or fortune-telling. Cross-referenced with 吉日 (きちじつ/きちにち), which is more common.
The kanji 生 (life, living) and 日 (day) combine to suggest a 'living day' or 'day of life', but the exact derivation is uncertain. The reading いくひ is a native Japanese reading (kun'yomi).
