Groovy date ranges (stolen from http://java.dzone.com/articles/groovy-goodness-loop-through)

dateRanges.groovy

// We can loop from today to next week and invoke a closure for each day.
def today = new Date().clearTime()
def nextWeek = today + 7

today.upto(nextWeek) {
    // Print day of the week.
    println it.format('EEEE')
}

println()

nextweek.downto(today) {
    prinltn it.format('EEEE')
}