\ holidays 97.12.10 3:53 pm NAB needs calendar : Christmas ( year -- d) 25 December rot dmy>date ; : Epiphany ( year -- d) 1- Christmas 12 m+ ; : Labour-day ( year -- d) 1 September rot dmy>date Monday first ; : Advent ( year -- d) 30 November rot dmy>date Sunday nearest ; : daylight-savings-start ( year -- d) 1 April rot dmy>date Sunday first ; : daylight-savings-end ( year -- d) 31 October rot dmy>date Sunday last ;