diff --git a/flake.lock b/flake.lock
index d4d2798..5a5e95c 100644
--- a/flake.lock
+++ b/flake.lock
@@ -28,11 +28,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1745557122,
-        "narHash": "sha256-eqSo9ugzsqhFgaDFYUZj943nurlX4L6f+AW0skJ4W+M=",
+        "lastModified": 1747688870,
+        "narHash": "sha256-ypL9WAZfmJr5V70jEVzqGjjQzF0uCkz+AFQF7n9NmNc=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "dd26f75fb4ec1c731d4b1396eaf4439ce40a91c1",
+        "rev": "d5f1f641b289553927b3801580598d200a501863",
         "type": "github"
       },
       "original": {
@@ -44,11 +44,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1745742390,
-        "narHash": "sha256-1rqa/XPSJqJg21BKWjzJZC7yU0l/YTVtjRi0RJmipus=",
+        "lastModified": 1750646418,
+        "narHash": "sha256-4UAN+W0Lp4xnUiHYXUXAPX18t+bn6c4Btry2RqM9JHY=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "26245db0cb552047418cfcef9a25da91b222d6c7",
+        "rev": "1f426f65ac4e6bf808923eb6f8b8c2bfba3d18c5",
         "type": "github"
       },
       "original": {
@@ -60,11 +60,11 @@
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1745794561,
-        "narHash": "sha256-T36rUZHUART00h3dW4sV5tv4MrXKT7aWjNfHiZz7OHg=",
+        "lastModified": 1750776420,
+        "narHash": "sha256-/CG+w0o0oJ5itVklOoLbdn2dGB0wbZVOoDm4np6w09A=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "5461b7fa65f3ca74cef60be837fd559a8918eaa0",
+        "rev": "30a61f056ac492e3b7cdcb69c1e6abdcf00e39cf",
         "type": "github"
       },
       "original": {
@@ -81,11 +81,11 @@
         "treefmt-nix": "treefmt-nix"
       },
       "locked": {
-        "lastModified": 1745913556,
-        "narHash": "sha256-hKf2z9fw7vwRBa4CCijolsZt+fqSCixSGai2MS0l+Wg=",
+        "lastModified": 1751030875,
+        "narHash": "sha256-x4EqjJUyJ3mHRtFYQP+FSDzT4A+1DEDig1LtwTsIJTc=",
         "owner": "nix-community",
         "repo": "nur",
-        "rev": "670e6a286982af78be5fc0b5109356db2d361119",
+        "rev": "48ce5dd4e350f18380810882dd787839c6433dda",
         "type": "github"
       },
       "original": {
diff --git a/home/calendars.nix b/home/calendars.nix
index 3051570..bb3b888 100644
--- a/home/calendars.nix
+++ b/home/calendars.nix
@@ -59,32 +59,38 @@ in
 
   accounts.calendar.basePath = "${config.xdg.dataHome}/calendars";
   accounts.calendar.accounts = {
+
     till = calDefaults // {
       khal.enable = true;
       primary = true;
       khal.color = "light blue";
       remote = myRemote "personal";
     };
+
     mitlisa = calDefaults // {
       khal.enable = true;
       khal.color = "light magenta";
       remote = myRemote "lisa-und-till";
     };
+
     family = calDefaults // {
       khal.enable = true;
       khal.color = "dark magenta";
       remote = myRemote "family";
     };
+
     bdays = calDefaults // {
       khal.enable = true;
       khal.color = "yellow";
       remote = myRemote "geburtstage";
     };
+
     polit = calDefaults // {
       khal.enable = true;
       khal.color = "dark gray";
       remote = myRemote "polit";
     };
+
     ihg = calDefaults // {
       khal.enable = true;
       khal.color = "dark cyan";
@@ -93,6 +99,7 @@ in
         url  = "https://geocom.uni-frankfurt.de/radicale/ihg/5012a739-dbaf-334b-f093-8db1860bc26e/";
       };
     };
+
     "eintracht_m" = calDefaults // {
       khal.enable = true;
       khal.color = "light red";
@@ -101,6 +108,7 @@ in
         url  = "http://i.cal.to/ical/257/eintrachtfrankfurt/spielplan/28ae0d30.f781380b-e6f28bd4.ics";
       };
     };
+
     "eintracht_f" = calDefaults // {
       khal.enable = true;
       khal.color = "dark red";
@@ -109,6 +117,16 @@ in
         url  = "http://i.cal.to/ical/5940/eintrachtfrankfurt/spielplan-frauen-profis/28ae0d30.f781380b-1763bff2.ics";
       };
     };
+
+    "feiertage" = calDefaults // {
+      khal.enable = true;
+      khal.color = "dark green";
+      remote = {
+        type = "http";
+        url  = "https://ics.tools/Feiertage/hessen.ics";
+      };
+    };
+
     "grid" = calDefaults // {
       khal.enable = true;
       khal.color = "light green";
diff --git a/home/default.nix b/home/default.nix
index 41db11a..5a96759 100644
--- a/home/default.nix
+++ b/home/default.nix
@@ -5,7 +5,6 @@
   home.packages = with pkgs; [
 
     # messenger
-    element-desktop
     signal-desktop
     tdesktop
 
@@ -30,7 +29,6 @@
 
     # media
     bookworm
-    heroic
     anki-bin
     freetube
     qbittorrent
diff --git a/home/mail/config.neomuttrc b/home/mail/config.neomuttrc
index 870ebec..cc7b6d3 100644
--- a/home/mail/config.neomuttrc
+++ b/home/mail/config.neomuttrc
@@ -54,7 +54,8 @@ folder-hook . source                 ~/.config/neomutt/bindings.neomuttrc
 # source ~/.config/neomutt/pgp.neomuttrc
 
 # Compose
-set editor = "nvim -c 'call woof#init#Init()'"
+# set editor = "nvim -c 'call woof#init#Init()'"
+set editor = "nvim"
 set edit_headers
 set forward_format = "Fwd: %s"
 set forward_attachments
diff --git a/home/r.nix b/home/r.nix
index 9507685..3248ad8 100644
--- a/home/r.nix
+++ b/home/r.nix
@@ -44,6 +44,7 @@
         eurostat
         extrafont
         ggplot2
+        ggridges
         jsonlite
         kableExtra
         knitr
@@ -60,6 +61,7 @@
         RColorBrewer
         readODS
         revealjs
+        restatis
         rlist
         rmarkdown
         rnaturalearth
diff --git a/system/web-server/mail/postfix.nix b/system/web-server/mail/postfix.nix
index a00fba8..e5a1130 100644
--- a/system/web-server/mail/postfix.nix
+++ b/system/web-server/mail/postfix.nix
@@ -2,13 +2,13 @@
 
 let
 
-  submissionHeaderCleanupRules = pkgs.writeText "submission_header_cleanup_rules" ''
-     /^Received:/            IGNORE
-     /^X-Originating-IP:/    IGNORE
-     /^X-Mailer:/            IGNORE
-     /^User-Agent:/          IGNORE
-     /^X-Enigmail:/          IGNORE
-     /^Message-ID:\s+<(.*?)@.*?>/ REPLACE Message-ID: <$1@ktiu.net>
+  submissionheadercleanuprules = pkgs.writetext "submission_header_cleanup_rules" ''
+     /^received:/            ignore
+     /^x-originating-ip:/    ignore
+     /^x-mailer:/            ignore
+     /^user-agent:/          ignore
+     /^x-enigmail:/          ignore
+     /^message-id:\s+<(.*?)@.*?>/ replace message-id: <$1@ktiu.net>
   '';
 
 in {