diff --git a/modules/modules.nix b/modules/modules.nix
index 93238ce10eb5..52543f4d6f02 100644
--- a/modules/modules.nix
+++ b/modules/modules.nix
@@ -302,6 +302,7 @@ let
     ./services/udiskie.nix
     ./services/unclutter.nix
     ./services/unison.nix
+    ./services/vdirsyncer.nix
     ./services/volnoti.nix
     ./services/window-managers/awesome.nix
     ./services/window-managers/bspwm/default.nix
diff --git a/modules/services/vdirsyncer.nix b/modules/services/vdirsyncer.nix
new file mode 100644
index 000000000000..59cc786a43d6
--- /dev/null
+++ b/modules/services/vdirsyncer.nix
@@ -0,0 +1,70 @@
+{ pkgs, lib, config, ... }:
+with lib;
+let
+  cfg = config.services.vdirsyncer;
+  formatToUnknownFormat = settings:
+    let
+      quoteStr = s: ''"${s}"'';
+      mkKeyValue = name: value: "${name} = ${mkValue value}";
+      mkValue = value:
+        if builtins.isList value then
+          "[${concatStringsSep ", " (map mkValue value)}]"
+        else if builtins.isString value then
+          quoteStr value
+        else
+          (toString value);
+      mkSection = title: val: ''
+        [${title}]
+        ${concatStringsSep "\n" (mapAttrsToList mkKeyValue val)}
+      '';
+    in concatStringsSep "\n" (mapAttrsToList mkSection settings);
+  cfgFile =
+    pkgs.writeText "vdirsyncer.conf" (formatToUnknownFormat cfg.settings);
+in {
+  options.services.vdirsyncer = {
+    enable = mkEnableOption "synchronization of calendars";
+    settings = mkOption { type = types.attrs; };
+    configFile = mkOption {
+      type = types.path;
+      default = cfgFile;
+    };
+    onBootSec = mkOption {
+      type = types.str;
+      default = "15min";
+    };
+    onUnitActiveSec = mkOption {
+      type = types.str;
+      default = "30min";
+    };
+  };
+
+  config = mkIf cfg.enable {
+    systemd.user.timers.vdirsyncer = {
+      Unit = { Description = "Timer to synchronize calendars"; };
+
+      Timer = {
+        OnBootSec = cfg.onBootSec;
+        OnUnitActiveSec = cfg.onUnitActiveSec;
+      };
+
+      Install.WantedBy = [ "timers.target" ];
+    };
+
+    systemd.user.services.vdirsyncer = {
+      Unit = {
+        Description = "Synchronize your calendars";
+        After = [ "network-online.target" ];
+        Wants = [ "network-online.target" ];
+      };
+
+      Install.WantedBy = [ "default.target" ];
+
+      Service = {
+        ExecStart = "${pkgs.vdirsyncer}/bin/vdirsyncer -c ${cfgFile} sync";
+        Restart = "on-failure";
+        Type = "oneshot";
+        RestartSec = 30;
+      };
+    };
+  };
+}