late-night time slot
Refers to a time slot or period late at night, often used in contexts like TV programming, radio, or business hours.
I record and watch programs in the late-night time slot.
This shop is open even during the late-night hours.
ゴールデンタイム is the peak-viewership evening slot, while 深夜帯 refers to the late-night broadcast slot with the lowest viewership.
Compound of 深夜 (late night) and 帯 (zone, band). The exact historical derivation is uncertain, but it follows a common pattern for time-slot terms.