8 o'clock to 2 1 point. According to the public information of Gongshu District Library, the holiday time of Labor Day in 2023 is from May/KLOC-0 to May 5, and the opening hours of Hangzhou Library during the holiday period are announced as follows: Citizen Center, May/KLOC-0, May 2, May 4 and May 5: Auditorium and self-study area: 8: 00 to 2 1.