auspicious day; lucky day; happy occasion
A somewhat formal or literary term for a day considered fortunate or suitable for celebrations. Often used in greetings or well-wishes for special events.
Congratulations on this auspicious day.
On this happy occasion of your wedding, I offer my heartfelt congratulations.
auspicious date
Standard kanji form for 'auspicious day'; 佳 means 'good, beautiful' and 辰 refers to a day or time.
Variant kanji form using 嘉 ('auspicious, praise'); less common but still encountered.
The word is composed of 佳 (good, beautiful) or 嘉 (auspicious) and 辰 (day, time). The exact historical derivation is uncertain, but it has been used in classical and formal Japanese to denote a fortunate day.