A public 24-hour clock in Curitiba, Brazil, with the hour hand on the surface plus the moment hand on The within. The modern 24-hour clock could be the convention of timekeeping during which the working day operates from midnight to midnight and is divided into 24 hrs. Giám ??c S? N?i v? nói có th? t?c hành chính ? Hà N?i s? h? s? g?p 39 l?n