http://ruby-ua.blogspot.com/2012/05/ruby.html

countdown.rb

# -*- encoding: utf-8 -*-

require 'date'

class BirthdayCountdown
  # Cache @month, @day and @year on initialization
  def initialize(month, day, zone = '+00:00')
    @birthday_month = month
    @birthday_day   = day
    @zone = zone

    # Current date
    @month = DateTime.now.month
    @day   = DateTime.now.day
    @year  = DateTime.now.year
  end


  # Is it birthday?
  def isit?
    @month == @birthday_month && @day == @birthday_day
  end

  # For the countdown
  def seconds_to_go
    ( (next_birthday - DateTime.now) * 24 * 60 * 60 ).to_i
  end

  def time_to_go_in_words
    (day ,hour = (tmp, min = (tmp, sec = (seconds_to_go.to_i).divmod(60))[0].divmod(60))[0].divmod(24))
    time_s = ''
    time_s << " #{day} #{choose_plural(day, 'день', 'дні', 'днів')}"          unless day.zero?
    time_s << " #{hour} #{choose_plural(hour, 'година', 'години', 'годин')}"  unless hour.zero?
    time_s << " #{min} #{choose_plural(min, 'хвилина', 'хвилини', 'хвилин')}" unless min.zero?
    #time_s << " #{sec} #{choose_plural(sec, 'секудна', 'секунди', 'секунд')}" unless sec.zero?

    return time_s.strip
  end

  :private

  # Is is the current month after the birthday month?
  #
  def passed_birthday_month?
    @month > @birthday_month
  end

  # Is the current month the same month as the birthday month
  # and the day
  #
  def passed_birthday_day?
     @month == @birthday_month && @day > @birthday_day
  end

  # Happened this year
  #
  def already_happend?
    passed_birthday_month? || passed_birthday_day?
  end

  # Returns the next birthday
  #
  def next_birthday
    if already_happend?
      # Add 1 year if it's already happened
      DateTime.new(@year + 1 , @birthday_month, @birthday_day, 0, 0, 0, @zone) 
    else
      # Create this years date
      DateTime.new(@year, @birthday_month, @birthday_day, 0, 0, 0, @zone)
    end
  end

  # Вибирає потрібний відмінок в залежності від числа
  #
  def choose_plural( amount, *variants )
    variant = ( (amount % 10 == 1 && amount % 100 != 11) ? ( 1 ) : ( amount % 10 >= 2 && amount % 10 <= 4 && (amount % 100 < 10 || amount % 100 >= 20) ) ? 2 : 3 )

    variants[variant - 1]
  end

end

days_to_euro.rb

# -*- encoding: utf-8 -*-

require 'bundler'
ENV['BUNDLE_GEMFILE'] = File.join(File.dirname(__FILE__) ,'Gemfile')
Bundler.setup :default

require 'vkontakte'
require_relative 'countdown'

if __FILE__ == $0
  CLIENT_SECRET = ''
  CLIENT_ID     = ''

  email = ''
  pass = ''
  
  year = 2012
  month = 6
  day = 8

  if DateTime.now < DateTime.new(year, month, day)
    countdown = BirthdayCountdown.new(month, day, '+03:00')
    text = "До Євро-2012 залишилось #{countdown.time_to_go_in_words}"

    vk = Vkontakte::Client.new(CLIENT_ID, CLIENT_SECRET)
    vk.login!(email, pass, scope = '1024')

    vk.api.status_set(:text => text)
  end
end