expression, noun
day of the Rooster
Refers to the day of the Rooster in the Chinese zodiac cycle, especially associated with the Tori no Ichi festival in November.
酉の日には、浅草の酉の市に行く人が多い。
On the day of the Rooster, many people go to the Tori no Ichi fair in Asakusa.
Tori no Ichi is the festival held on the day of the Rooster, while 酉の日 refers to the zodiac day itself.
From 酉 (rooster, the tenth sign of the Chinese zodiac) + の (possessive particle) + 日 (day).