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+;;; my-calendar.el --- Custom calendar configurations
+;; -*- mode: emacs-lisp -*-
+;; vim: set ts=8 sw=2 tw=0 fenc=utf-8 ft=lisp:
+;;
+;; Aaron LI
+;; Created: 2017-03-01
+;; Updated: 2017-03-14
+;;
+
+;;; Commentary:
+;; Custom calendar configurations
+;;
+
+;;; Code:
+
+(with-eval-after-load 'calendar
+  (require 'cal-china)
+
+  ;; Date style: month/day/year (default)
+  (setq calendar-date-style 'american)
+
+  ;; Wrapper function of `diary-chinese-anniversary' using an intuitive year
+  ;; NOTE: Built-in `diary-chinese-anniversary' accepts an obscure year
+  ;;       notation consisting of the 60-year cycle number and year number
+  ;;       within this cycle.
+  ;; Credit: https://emacs-china.org/t/agenda-list/2119/15
+  (defun my/diary-chinese-anniversary (month day &optional year mark)
+    "Like `diary-chinese-anniversary' but use an intuitive year argument."
+    (if year
+        (let* ((d-date (diary-make-date month day year))
+               (a-date (calendar-absolute-from-gregorian d-date))
+               (c-date (calendar-chinese-from-absolute a-date))
+               (cycle (car c-date))
+               (yy (cadr c-date))
+               (y (+ (* 100 cycle) yy)))
+          (diary-chinese-anniversary month day y mark))
+      (diary-chinese-anniversary month day year mark)))
+
+  ;; END: `with-eval-after-load'
+  )
+
+(provide 'my-calendar)
+
+;;; my-calendar.el ends here