define timeperiod {
  timeperiod_name                misc single days
  alias                          Misc Single Days
  1999-01-28                     00:00-24:00 ; January 28th, 1999
  day 3                          00:00-24:00 ; 3rd Monday of every month
  february -1                    00:00-24:00 ; Last day in February of every year
  february 10                    00:00-24:00 ; February 10th of every year
  friday -2                      00:00-24:00 ; 2nd to last Friday of every month
  monday 3                       00:00-24:00 ; 3rd Monday of every month
  thursday -1 november           00:00-14:00 ; Last Thursday in November of every year
}
