The CinemaSins take on V for Vendetta points out that Evey leaves her apartment around 11pm, half an hour after curfew began, and calls this out as a very stupid decision, as it gets her into trouble very quickly.
Thinking about it, I don't really understand why she chose to do this. In the graphic novel, she left after curfew on purpose, as she was (trying to get) involved in prostitution. However, this is not the case in the movie - instead, she was on her way to a date with Gordon Deitrich, so I don't see a good reason why she'd leave after curfew.
Was curfew just not considered a big deal (a later scene shows many people leaving their houses to see V's "fireworks")? Did Gordon purposely ask to meet so late, as to test her, since he intended to reveal to her his views which were considered anti-government?