notes.txt

daily:X
weekly:X:XXXXXXX
monthly:X:XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
monthly:X:XXXXX:XXXXXXX
yearly:X:XXXXXXXXXXXX
yearly:X:XXXXXXXXXXXX(:XXXXX:XXXXXXX)

dates = calculate_recurrence(Date.today,'weekly','2:91')

def check(dates)
  dates.each { |date| p "#{date.strftime('%A %B %d, %Y')}" };nil
end

# Binary representation of days of the week
0 1 Saturday
1 2 Friday
2 3 Thursday
4 4 Wednesday
8 5 Tuesday
16 6 Monday
32 7 Sunday





require 'date'
class Date
  def nth_weekday(nth,day_of_week)
    nth = nth + 1
    last = nth == 6
    nth = 5 if last
    date = Date.civil(self.year,self.month)
    current_week_day = date.cwday
    day_of_week = 7 if day_of_week == 0
    nth -= 1 if day_of_week >= current_week_day
    offset = (7*nth - (current_week_day - day_of_week))
    new_date = date + (7*nth - (current_week_day - day_of_week))
    return new_date if new_date.month == date.month
    return last ? new_date - 7 : nil
  end
end

puts Date.today.nth_weekday(3,3).to_s
puts Date.today.nth_weekday(4,3).to_s
puts Date.today.nth_weekday(6,3).to_s