noun
midnight; 12 AM; 24:00
Refers to the exact moment of midnight in the 24-hour clock system. Often used in schedules, transportation timetables, and official contexts.
終電は二十四時発です。
The last train departs at midnight.
イベントは二十四時に終了します。
The event ends at midnight.
Compound of 二十四 (twenty-four) and 時 (hour), literally 'twenty-fourth hour', following the 24-hour clock convention.