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Added Australian holidays

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Sudhir Shenoy 2017-07-22 22:02:55 +09:00
parent ee0e5b7d9c
commit c17039fd47
1 changed files with 45 additions and 5 deletions
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holidays.lisp
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@ -24,12 +24,52 @@
;;; NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
;;; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
;;;
;;; holidays.lisp - Functions to generate holidays in various countries
;;; for any given year.
;;;
;;;; Holidays.lisp - Functions to generate holidays in various countries
;;;; for any given year. Only centres which either have fixed holidays or
;;;; movable holidays that depend only on day of the week, easter or the
;;;; equinoxes are implemented (Oz, Japan, Germany, EUR, Switz, UK, USA).
;;;;
;;;; TODO - Add lunar calendar based holiday computations.
(in-package :cl-dates)
(defun aus-holidays (year &key (which :settlement))
"Australian settlement holidays"
(declare (ignore which))
(labels ((move-sat-sun-to-mon (date)
(let ((dow (day-of-week date)))
(cond ((eq dow :saturday) (+ date 2))
((eq dow :sunday) (1+ date))
(t date)))))
(let (hols)
;; New year's day - move to Monday if on weekend
(push (move-sat-sun-to-mon (ymd->date year 1 1)) hols)
;; Australia day
(push (move-sat-sun-to-mon (ymd->date year 1 26)) hols)
(let ((easter (easter-day year)))
(push (- easter 2) hols) ; Good Friday
(push (+ easter 1) hols)) ; Easter Monday
;; ANZAC day
(push (move-sat-sun-to-mon (ymd->date year 4 25)) hols)
;; Queen's birthday - 2nd Mon of June
(push (nth-day-of-week (ymd->date year 6 1) :monday 2) hols)
;; Bank holiday - first Mon in Aug
(push (nth-day-of-week (ymd->date year 8 1) :monday 1) hols)
;; Labour day - first Mon in Oct
(push (nth-day-of-week (ymd->date year 10 1) :monday 1) hols)
;; Christmas and boxing day - move to Mon/Tue if on weekend
(let* ((xmas (ymd->date year 12 25))
(dow (day-of-week xmas)))
(cond ((eq dow :friday) (progn (push xmas hols)
(push (+ xmas 3) hols)))
((eq dow :saturday) (progn (push (+ xmas 2) hols)
(push (+ xmas 3) hols)))
((eq dow :sunday) (progn (push (+ xmas 1) hols)
(push (+ xmas 2) hols)))
(t (progn (push xmas hols)
(push (+ xmas 1) hols)))))
(remove-duplicates (sort (mapcar #'jday-number hols) #'<)))))
(defun german-holidays (year &key (which :settlement))
"German holidays for settlement, Eurex and Euwax"
(let ((hols (list (ymd->date year 1 1)))) ; New year's day
@ -53,7 +93,7 @@
(remove-duplicates (sort (mapcar #'jday-number hols) #'<))))
(defun japan-holidays (year &key (which :settlement))
"Japan holidays for settlement (which = nil returns only national holidays)"
"Japan holidays for settlement (If which is NIL, bank holidays that are not national holidays are excluded)"
(labels ((move-sun-next-bday (date-list)
(let ((moved-dates nil)
(dates (mapcar #'jday-number date-list)))