expression
first Day of the Rooster in the eleventh month
Refers to the first Day of the Rooster (酉の日) in the eleventh month of the old lunar calendar, associated with the Tori no Ichi festival. A fixed expression used in historical and cultural contexts.
一の酉は、酉の市の最初の祭日です。
Ichi no Tori is the first festival day of the Tori no Ichi.