diff --git a/users/simon/base.nix b/users/simon/base.nix
index c08de05..777a5db 100644
--- a/users/simon/base.nix
+++ b/users/simon/base.nix
@@ -39,6 +39,7 @@ in
       ./modules/mpd.nix
       ./modules/neovim.nix
       ./modules/sway.nix
+      ./modules/vdirsyncer.nix
       ./modules/xcompose.nix
       ./modules/xdg.nix
       ./modules/zathura.nix
diff --git a/users/simon/modules/vdirsyncer.nix b/users/simon/modules/vdirsyncer.nix
new file mode 100644
index 0000000..b6d2f98
--- /dev/null
+++ b/users/simon/modules/vdirsyncer.nix
@@ -0,0 +1,100 @@
+{ config, pkgs, ... }:
+let
+  contactsUuid = "d6abd3ea-3abd-7550-9f24-f06293d36a82";
+in
+{
+  home.packages = with pkgs; [
+    khal
+    khard
+    vdirsyncer
+  ];
+
+  xdg.configFile = {
+    "vdirsyncer/config".text = ''
+      [general]
+      status_path = "${config.xdg.configHome}/vdirsyncer/status/"
+
+      [pair contacts]
+      a = "contacts_local"
+      b = "contacts_remote"
+      collections = ["from a", "from b"]
+      metadata = ["displayname"]
+
+      [storage contacts_local]
+      type = "filesystem"
+      path = "~/.contacts/"
+      fileext = ".vcf"
+
+      [storage contacts_remote]
+      type = "carddav"
+      url = "https://dav.sbruder.de/"
+      username = "simon"
+      password.fetch = ["command", "sh", "-c", "pass sbruder.de/account | head -n 1"]
+
+      [pair calendar]
+      a = "calendar_local"
+      b = "calendar_remote"
+      collections = ["from a", "from b"]
+      metadata = ["displayname"]
+
+      [storage calendar_local]
+      type = "filesystem"
+      path = "~/.calendar/"
+      fileext = ".ics"
+
+      [storage calendar_remote]
+      type = "caldav"
+      url = "https://dav.sbruder.de/"
+      username = "simon"
+      password.fetch = ["command", "sh", "-c", "pass sbruder.de/account | head -n 1"]
+    '';
+
+    "khal/config".text = ''
+      [calendars]
+
+      [[calendar_local]]
+      path = ~/.calendar/*
+      type = discover
+
+      [[contacts_local]]
+      path = ~/.contacts/${contactsUuid}/
+      type = birthdays
+
+      [locale]
+      timeformat = %H:%M
+      dateformat = %Y-%m-%d
+      longdateformat = %Y-%m-%d
+      datetimeformat = %Y-%m-%d %H:%M
+      longdatetimeformat = %Y-%m-%d %H:%M
+    '';
+
+    "khard/khard.conf".text = ''
+      [addressbooks]
+      [[personal]]
+      path = ~/.contacts/${contactsUuid}/
+
+      [general]
+      debug = no
+      default_action = list
+      editor = nvim, -i, NONE
+      merge_editor = nvim, -d
+
+      [contact table]
+      display = first_name
+      group_by_addressbook = no
+      reverse = no
+      show_nicknames = yes
+      show_uids = no
+      sort = last_name
+      localize_dates = yes
+      preferred_phone_number_type = pref, cell, home
+      preferred_email_address_type = pref, home, work
+
+      [vcard]
+      private_objects = Jabber,
+      preferred_version = 3.0
+      search_in_source_files = no
+      skip_unparsable = no
+    '';
+  };
+}