weekdays.rb

#!/usr/bin/env ruby
require 'date'

bank_holidays = {}
bank_holidays['Neujahr'] = '01.01.2016'
bank_holidays['Karfreitag'] = '25.03.2016'
bank_holidays['Ostermontag'] = '28.03.2016'
bank_holidays['Maifeiertag'] = '01.05.2016'
bank_holidays['Christi Himmelfahrt'] = '05.05.2016'
bank_holidays['Pfingstmontag'] = '16.05.2016'
bank_holidays['Fronleichnam'] = '26.05.2016'
bank_holidays['Tag der Deutschen Einheit'] = '03.10.2016'
bank_holidays['Allerheiligen'] = '01.11.2016'
bank_holidays['1. Weihnachtstag'] = '25.12.2016'
bank_holidays['2. Weihnachtstag'] = '26.12.2016'



start_date = Date.parse ARGV[0]
actual_date = start_date
while actual_date < Date.today
  actual_date = actual_date + 1
  next if actual_date.strftime('%u').to_i > 5
  next if bank_holidays.values.include? actual_date.strftime('%d.%m.%Y')
  puts actual_date
end