noun
day prostitutes had to receive clients
Archaic term from the Edo period referring to a designated day when prostitutes were obligated to accept clients.
江戸時代の遊郭では、売り日には遊女が客を取らなければならなかった。
In the pleasure quarters of the Edo period, on the 売り日, courtesans had to receive clients.
Compound of 売り (uri, 'selling') + 日 (hi, 'day'), with rendaku voicing to び. The exact historical derivation is uncertain, but the term is associated with Edo-period red-light districts.