Date calculation down to the minute

Hi,

I'm subtracting date of birth from date of death to calculate age using
the following formula. (Actually, this formula is using Time.now,
because date of death is in another Controller and I haven't figured
out how to access it from where date of birth lives. Ideas?) Anyway,
this formula works fine if the age is "years", but in the case of ages
less than a year, it just returns 0. I'd like for it to return
minutes, days, weeks, months, or years -- depending on the age. Ideas
and suggestions always welcome!! Thank you! ~Ali

def age

    @age ||= begin
      a = read_attribute(:age)
        if a.nil?
          m = read_attribute(:dob)
          if not m.nil?
            now = Time.now
            now.year - dob.year - (dob.to_time.change(:year =>
now.year) > now ? 1 : 0)
          end
          else
          a
        end
     end
   end

Time.now - dob.to_time == age in seconds

http://www.ruby-doc.org/core/classes/Time.html#M000281

You can get anything else from there.

Hope that helps !