noun
happy hour
Borrowed from English; refers to a limited time, usually in the early evening, when bars or restaurants offer discounts on drinks and sometimes food.
あの居酒屋は夕方5時から7時までハッピーアワーをやっている。
That izakaya has a happy hour from 5 to 7 in the evening.
ハッピーアワー中は生ビールが半額
Draft beer is half price during happy hour.