import groovy.time.TimeCategory

rt = Runtime.getRuntime()
threads = rt.availableProcessors()

def now = new Date()
def then = new Date().parse('yyyy-MM-dd-hh','2015-09-23-18')
def cruise = Calendar.instance
cruise.set(2015,9,5,16,0,0)

use TimeCategory, {
  println "Current DateTime: " + now
  def c = then - now
  def b = cruise.time - now
  println "My contract ends in ${c.days.intdiv(7)} weeks, ${c.days % 7} days, ${c.hours +1} hours."
  print "Our Bahama cruise leaves the port in "
  println "${b.days.intdiv(7)} weeks, ${b.days % 7} days, ${b.hours} hours, and ${b.minutes} minutes."
}