#!/usr/koeki/bin/ruby

def time_set(year,month,day,hour,min,zone)
  
  #p Time.mktime(year, month, day, hour, min, zone).to_f
  #p Time.utc(year, month, day, hour, min, zone).to_f
  sec = Time.mktime(year, month, day, hour, min).to_f - Time.utc(year,1,1,0).to_f 
  ENV['TZ'] = nil # もとに戻す
  sec/60.0      # 分に換算
end

y = 2008
m = 12
d = 1
h = 0
min = 0

#x = "東京"
x = "ニューヨーク"

if x == "東京"
  ENV['TZ'] = 'Japan'
elsif x == "ニューヨーク"
  ENV['TZ'] = 'US/Eastern'
elsif x == "ミラノ"
  ENV['TZ'] = 'Europe/Paris'
end

# p Time.local(y,m,d,h,min)
# p z = Time.local(y,m,d,h,min).zone

time_set(y,m,d,h,min,z)