i would assume that each day listed on the sign marks the beginning period of when it is no longer acceptable to stand. therefore, you can’t stand there on saturday at 8 p.m. which would extend to sunday at 5 a.m. when did you get this ticket? i’m guessing saturday night some time, given the time of your post accompanied by your feeling of injustice for receiving said ticket. it seems pretty obvious that they wouldn’t want any parking/standing on weekends. why would it be thursday and friday nights but not saturday?