Fortunately, we don't have at-will employment over here, and I have been quite up-front to my manager that in this team I would be leaving at 5:01, because I ha

Fortunately, we don't have at-will employment over here, and I have been quite up-front to my manager that in this team I would be leaving at 5:01, because I have a little daughter at home. And it was fine, because we already had a senior guy, working from his house, from 7:01 to 15:01 :-) And it is fine if somebody leaves early because of i.e. board-game night, or pub-crawl, unless our servers are on fire or you already have a scheduled meeting :) To be honest I kind-of pride myself on being a 9 to 5 programmer. I remember reading about some studies that consistent work 6 hours a day is more productive than 12 hours a day after ~3 months. Then I saw this with my own eyes, where I worked with a friend on a project, and I always worked every day between 8 00 and 12 00 and he tried to crunch from like 1 pm to 1 am ... my code was less buggy, more stable and by a week we actually had ~same ammount of working lines written.