How many weeks are in the season of Lent?

Lent is forty days (to commemorate the forty days Jesus spent in the wilderness before commencing his mission, not including Sundays. It begins on Ash Wednesday and finishes at midnight on the Saturday before Easter Sunday. This year (2009) Lent is 46 days long (including 6 Sundays) so it is just over six weeks long.
6 weeks and 2 days
There are 6 full weeks of Lent, plus the 4 days previous to that, from Ash Wednesday to the following Saturday.