diff --git a/gtd.el b/gtd.el
index a031195..8c6fdf2 100644
--- a/gtd.el
+++ b/gtd.el
@@ -6,8 +6,8 @@
         org-agenda-files (mapcar (lambda (filename) (expand-file-name filename org-directory))
                                  '("gtd/inbox.org"
                                    "gtd/tasks.org"
-                                   "gtd/journal.org"
-                                   "gtd/calendar.org")))
+                                   "caldav/personal.org" ;; synced by org-caldav
+                                   "gtd/journal.org")))
   ;; (file-expand-wildcards (concat org-directory "gtd/*.org"))))
   ;; org-agenda-files (append (mapcar 'file-truename
   ;;                                  (file-expand-wildcards (concat org-directory "gtd/*.org")))
@@ -33,6 +33,7 @@
         ;; org-refile-target-verify-function nil
         ;; org-refile-targets '(("tasks.org" . (:maxlevel . 2))))
         org-refile-targets `(("tasks.org" . (:maxlevel . 2))
+                             (,(expand-file-name "caldav/personal.org" org-directory) . (:level . 0))
                              (,(expand-file-name "gtd/someday.org" org-directory) . (:maxlevel . 1)))))
 
   ;; Getting the following on capture:
@@ -221,6 +222,45 @@ show up there.\n\n"))
 
 (map! "C-c e" #'gtd-capture-event)
 
+;;; TODO: not working still
+;;; https://www.reddit.com/r/orgmode/comments/8rl8ep/making_orgcaldav_useable/
+(use-package! org-caldav
+  :autoload org-caldav-sync
+  :init
+  (defvar +gtd/org-caldav-directory nil
+     "Directory where org-caldav synchronizes the calendars to.")
+  (setq org-icalendar-alarm-time 10)
+  :config
+  (setq org-caldav-resume-aborted 'always
+        +gtd/org-caldav-directory (expand-file-name "caldav" org-directory)
+        org-caldav-save-directory +gtd/org-caldav-directory
+        org-caldav-backup-file (expand-file-name "org-caldav-backup.org" +gtd/org-caldav-directory)
+        org-caldav-url "https://nextcloud.maxschlueter.com/remote.php/dav/calendars/max"
+        org-caldav-calendar-id "test"
+        org-caldav-files `(,(expand-file-name "personal.org" +gtd/org-caldav-directory))
+        org-caldav-inbox (expand-file-name "personal.org" +gtd/org-caldav-directory))
+
+  ;; (after! org-agenda
+  ;;   (add-to-list 'org-agenda-files max/org-calendar-file t)
+  ;;   (setq org-agenda-include-diary t
+  ;;         org-agenda-insert-diary-strategy 'top-level
+  ;;         org-agenda-insert-diary-extract-time t
+  ;;         org-agenda-diary-file max/org-calendar-file))
+
+  ;; (setq org-caldav-calendars
+  ;;       `((:calendar-id "personal"
+  ;;          :files (,(expand-file-name "personal.org" +gtd/org-caldav-directory)))))
+           ;; :inbox ,(concat max/org-calendar-directory "personal.org"))))
+
+  (defun max/org-caldav-get-inbox ()
+    (let* ((calid (completing-read "Calendar: "
+                                   (cl-loop for cal in org-caldav-calendars
+                                            collect (plist-get cal :calendar-id))
+                                   nil t))
+           (calinbox (cl-loop for cal in org-caldav-calendars
+                              when (string= (plist-get cal :calendar-id) calid)
+                              return (plist-get cal :inbox))))
+      calinbox)))
 (after! org
   (setq org-clock-persist t
         ;; Useful when clocking in on a waiting task
diff --git a/packages.el b/packages.el
index 54ee42a..4fb038d 100644
--- a/packages.el
+++ b/packages.el
@@ -58,6 +58,7 @@
 (package! org-inline-pdf)
 (package! org-clock-convenience)
 (package! org-super-agenda)
+(package! org-caldav)
 (package! org-transclusion)
 
 ;; org-roam-ui keeps up with the latest features in org-roam