expression, noun
purification ceremony on the first day of the snake in the third lunar month
Archaic Shinto purification rite held on the first 巳の日 (day of the snake) of the third month in the old lunar calendar.
古い文献には、巳の日の祓が春の重要な行事として記されている。
In old documents, the purification ceremony on the first day of the snake is recorded as an important spring event.