From this blog come this-

I haven't seen Fahrenheit 9/11, but I know that Mr. Moore alleges that Bush spent 42% of his first eight months in office (before 9/11) on vacation, and that he proudly declares that this figure came from the Washington Post.  I couldn't find a Post article on this from 2001, but I did find this one from 2002--which says that Bush spent 42% of his term to date (Sept. 3, 2002) at vacation locations:

Bush has spent a whopping total of 250 days of his presidency at Camp David (123 days), Kennebunkport (12) and his Texas ranch (115). That means Bush has spent 42 percent of his term so far at one of his three leisure destinations.

It's obvious that these "vacation days" include weekends.  (You can do the math:  250/x=42/100; x=595 days=1.63 years).  Okay, 42% is a lot of vacation, but weekends account for 29% of our time.  I'm sure that a lot of this "vacation" time is just Bush going to Camp David for the weekend.  Can we really fault the President for going to Camp David on weekends?  If you take out weekends, you get 42%-29%, or 13% of the time that Bush was on vacation.

Okay, this is still a lot, although 13% looks a lot better than 42%.  Over a year, 13% is about 6.76 weeks of the year--which is still much more than most of us.  But we know that Bush's vacations are generally working vacations.  For example, he has hosted visits from leaders like Putin, Fox, and many others there.  This hardly seems like a real vacation.

As Hitchens points out today, there are a lot of problems with Fahrenheit 9/11.  It's pretty clear that Moore's "vacation time" allegation is one of them.