calendar hash


I'm trying to create a nested hash which should hold the dates
in my database as a kind of calendar. What I did so far is obviously
because I'm storing the week-number for every day in the week array.
I don't really understand nested hashes and can't find the solution.

what am I doing wrong here?? What's the right way of doing this??

  11 @calendar ={|h,k| h[k] }
  12 week = []
  13 Dates.find(:all).each do |row|
  14 date = Date.strptime(str="#{row.dato}")
  15 year = date.cwyear
  16 month = date.mon
  17 week << date.cweek
  18 @calendar[year][month] = week
  19 end

thanks in advance,