import java.util.Calendar
import java.text.SimpleDateFormat

def n_days_later(n:int) = {
  (c:Calendar) => {
    val r = c.clone.asInstanceOf[Calendar]
    r.add(Calendar.DATE, n)
    r
  }
}

val five_days_later = n_days_later(5)
val now = Calendar.getInstance

val formatter = new SimpleDateFormat("EEE, d MMM yyyy HH:mm:ss Z")
println(formatter.format(five_days_later(now).getTime))