Hour 25 is the first volume of the HKU Architecture Papers, a student-edited series of annual publications chronicling the design work of the Department of Architecture at the University of Hong Kong. With an emphasis on process and critical reflection, the series provides a window into contemporary design education in Hong Kong. Initiated and edited by a group of architecture students at the University of Hong Kong, Hour 25 creates a platform for architectural discourse through highlights of the year's best student works, critical essays from staff, reviews of programming, and a chronicle of the Department of Architecture. The 25th hour is a critical moment for architects: the space beyond the daily routine of 24 hours. It also exemplifies the struggle of architecture students: lack of sleep due to endless studio work. 24 hours a day is simply not sufficient.