Ruby script to calc remaining seconds to the date of Problem-2038.

problem_2038.rb

#! /usr/local/bin/ruby
#
# 2038年問題までの残り時間計算
# ( 2038年1月19日3時14分08秒 までの残り秒数 )
#
# date          name            version
# 2011.10.06    Masaru Koizumi  1.00 新規作成
# 2015.01.03    Masaru Koizumi  1.01 Shebang string 追加等
# 2020.01.30    Masaru Koizumi  1.02 ソース整形
#
# Copyright(C) 2011-2020 mk-mode.com All Rights Reserved.
#---------------------------------------------------------------------------------
# @param: [YYYYMMDDHHMMSS]
#---------------------------------------------------------------------------------
# 2019-01-15 01:34:08 で「残り 600,000,000 秒」
# 2020-02-01 00:14:08 で「残り 567,000,000 秒」
#++
require 'time'

class Problem2038
  DT_2038 = "2038-01-19 12:14:08"

  def initialize
    @tm_2038  = Time.parse(DT_2038).strftime("%Y-%m-%d %H:%M:%S")
    @sec_2038 = Time.parse(DT_2038).to_i
    tm = Time.now
    tm = Time.strptime(ARGV[0], "%Y%m%d%H%M%S") if ARGV[0]
    @tm_target  = tm.strftime("%Y-%m-%d %H:%M:%S")
    @sec_target = tm.to_i
  end

  def calc
    sec_remain = @sec_2038 - @sec_target
    str =  "PROBLEM: #{@tm_2038}\n"
    str << "         %13s"     % comma(@sec_2038)
    str << "( %032d ) secs.\n" % @sec_2038.to_s(2)
    str << " TARGET: #{@tm_target}\n"
    str << "         %13s"     % comma(@sec_target)
    str << "( %032d ) secs.\n" % @sec_target.to_s(2)
    str << "REMAING:\n"
    str << "         %13s"     % comma(sec_remain)
    str << "( %032d ) secs."   % sec_remain.to_s(2)
    puts str
  rescue => e
    $stderr.puts "[EXCEPTION][#{self.class.name}.#{__method__}] #{e}"
    exit 1
  end

private
  # カンマ挿入
  def comma(str)
    return str.to_s.gsub(/(\d)(?=(\d{3})+(?!\d))/, '\1,')
  end
end

Problem2038.new.calc