diff --git a/modules/programs/taskwarrior.nix b/modules/programs/taskwarrior.nix
index 47bf986..6861c9b 100644
--- a/modules/programs/taskwarrior.nix
+++ b/modules/programs/taskwarrior.nix
@@ -48,6 +48,12 @@ in {
       python # needed for hooks
 
       taskwarrior-hooks
+      vdirsyncer
+      khal
+      (pkgs.writers.writeBashBin "kalendar" ''
+        ${pkgs.vdirsyncer}/bin/vdirsyncer sync
+        ${pkgs.khal}/bin/ikhal
+      '')
 
       # bugwarrior
       (let
diff --git a/system/desktop/home-manager.nix b/system/desktop/home-manager.nix
index 0244204..e5fbfea 100644
--- a/system/desktop/home-manager.nix
+++ b/system/desktop/home-manager.nix
@@ -188,6 +188,45 @@ in {
       rm -f ~/.xmonad/xmonad.state
     '';
 
+    xdg.configFile."khal/config".text = ''
+      [calendars]
+
+      [[local_calendar]]
+      path = ~/.calendars/*
+      type = discover
+
+      [locale]
+      timeformat = %H:%M
+      dateformat = %Y-%m-%d
+      longdateformat = %Y-%m-%d
+      datetimeformat = %Y-%m-%d %H:%M
+      longdatetimeformat = %Y-%m-%d %H:%M
+    '';
+
+    xdg.configFile."vdirsyncer/config".text = ''
+      [general]
+      # A folder where vdirsyncer can store some metadata about each pair.
+      status_path = "~/.vdirsyncer/status/"
+
+      # CALDAV
+      [pair my_calendar]
+      a = "nextcloud_calendar"
+      b = "local_calendar"
+      collections = ["from a", "from b"]
+
+      [storage nextcloud_calendar]
+      type = "caldav"
+      url = "https://nextcloud.ingolf-wagner.de/"
+      username = "palo"
+      password.fetch = ["command", "${pkgs.pass}/bin/pass", "home/nextcloud/vdirsyncer/password"]
+
+      [storage local_calendar]
+      type = "filesystem"
+      path = "~/.calendars/"
+      fileext = ".ics"
+    '';
+
+
   };
 
   environment.systemPackages = let