This question is about what an architect does.
On average, architects work a 40-hour work week. This is pretty typical for a professional career, but unlike other professional careers, architects often work overtime and on weekends to finish various projects.
Working extra time is not something that is done constantly, but is generally done around busy times for architects, such as when there is a close deadline or an especially important client or presentation for which the architect needs to take extra time to prepare.