Create a todo formated file for this year. Ref. http://easyramble.com/how-to-manage-tasks-simply.html

create_todo_formated_file.rb

#!/usr/bin/env ruby

require "date"

def this_year
  ( ARGV[0] || DateTime.now.year ).to_i
end

def leap_year?
  Date.new(this_year).leap?
end

def last_day
  leap_year? ? 365 : 364
end

TODO_FILE_BASENAME = "DailyToDo"
gantan = DateTime.new(this_year, 1, 1, 0, 0, 0, "+0900")

todo_file = "./#{TODO_FILE_BASENAME}_#{this_year}.txt"
if File.exist?(todo_file)
  warn "Todo file was not created. This year's todo file already exists."
  exit
end

open(todo_file, "w") do |f|
  f.write <<EOS
***************** #{TODO_FILE_BASENAME} #{this_year} *****************
- : todo
= : doing
+ : done
**************************************************

EOS

  (0..last_day).each do |d|
    f.write "[#{(gantan + d).strftime("%Y/%m/%d %A")}]\n\n"
  end
end