diff --git a/azos-core b/azos-core
index 3d1cbc3..4efb0bd 160000
--- a/azos-core
+++ b/azos-core
@@ -1 +1 @@
-Subproject commit 3d1cbc3323ecc0e67234c52ebe23ba3d78c53ccd
+Subproject commit 4efb0bdbf6e642540966909ba052e7cd987474a5
diff --git a/nixos/configuration.nix b/nixos/configuration.nix
index fda17b8..1df7c92 100644
--- a/nixos/configuration.nix
+++ b/nixos/configuration.nix
@@ -18,6 +18,7 @@
   # Bootloader.
   boot.loader.systemd-boot.enable = true;
   boot.loader.efi.canTouchEfiVariables = true;
+  boot.binfmt.emulatedSystems = ["aarch64-linux"];
 
   nixpkgs = {
     overlays = [
diff --git a/pkgs/azos-emacs-lauretta.nix b/pkgs/azos-emacs-lauretta.nix
index 83db495..b30a221 100755
--- a/pkgs/azos-emacs-lauretta.nix
+++ b/pkgs/azos-emacs-lauretta.nix
@@ -15,5 +15,6 @@ orgTrivialBuild {
     pkgs.azos-emacs-station
 
     agent-shell
+    org-caldav
   ];
 }
diff --git a/pkgs/elisp/azos-emacs-lauretta.org b/pkgs/elisp/azos-emacs-lauretta.org
index 396ceba..7a39f27 100644
--- a/pkgs/elisp/azos-emacs-lauretta.org
+++ b/pkgs/elisp/azos-emacs-lauretta.org
@@ -128,6 +128,35 @@
     (kbd "n") 'azos/nixpkgs-search)
 #+end_src
 
+** CalDAV / Org Sync
+
+#+begin_src emacs-lisp
+(require 'org-caldav)
+
+(defvar azos/lauretta/nextcloud-user "aner"
+  "Nextcloud username for CalDAV sync.")
+
+(setq org-caldav-url "https://nextcloud.zakobar.com/remote.php/dav/calendars/1ddd03a6-4c2d-103c-9f7b-27b20313341d"
+      org-caldav-calendar-id "personal"
+      org-caldav-inbox "~/org/caldav-inbox.org"
+      org-caldav-files '("~/org/todo.org")
+      org-icalendar-timezone "Asia/Jerusalem")
+
+(defun azos/caldav-sync ()
+  "Sync org-caldav with Nextcloud calendar, reading password from pass."
+  (interactive)
+  (let* ((password (string-trim
+                    (shell-command-to-string
+                     (format "pass zakobar.com/users/%s" azos/lauretta/nextcloud-user))))
+         (url-http-real-basic-auth-storage
+          (list (list "nextcloud.zakobar.com:443"
+                      (cons azos/lauretta/nextcloud-user password)))))
+    (org-caldav-sync)))
+
+(define-key azos/global-minor-mode/open-keymap
+    (kbd "C") 'azos/caldav-sync)
+#+end_src
+
 * Provide
 
 #+begin_src emacs-lisp