noun
no-consultation day; day off for medical consultations
Refers to a day when a doctor's office, clinic, or hospital does not see patients. Often posted on signs or websites.
当院の休診日は木曜日と日曜日です。
Our clinic's no-consultation days are Thursdays and Sundays.
休診日には電話での問い合わせも受け付けていません。
On no-consultation days, we do not accept phone inquiries either.
診療日 is the opposite: a day when medical consultations are available.
Compound of 休 (rest, suspend) + 診 (medical examination) + 日 (day).