diff --git a/.vscode/tasks.json b/.vscode/tasks.json
index b3e620a..679293f 100644
--- a/.vscode/tasks.json
+++ b/.vscode/tasks.json
@@ -11,8 +11,8 @@
                 //"/home/gabm/Pictures/Wallpaper/torres_1.jpg",
                 "/home/gabm/Pictures/Screenshots/satty-20231116-10:35:51.png",
                 //"--fullscreen",
-                "--output-filename",
-                "/tmp/out.png",
+                //"--output-filename",
+                //"/tmp/out.png",
                 "--copy-command",
                 "wl-copy",
             ],
diff --git a/Cargo.lock b/Cargo.lock
index 67a1d77..3b2b8c8 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -17,6 +17,21 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
 
+[[package]]
+name = "android-tzdata"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e999941b234f3131b00bc13c22d06e8c5ff726d1b6318ac7eb276997bbb4fef0"
+
+[[package]]
+name = "android_system_properties"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "819e7219dbd41043ac279b19830f2efc897156490d7fd6ea916720117ee66311"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "anstream"
 version = "0.6.5"
@@ -183,6 +198,20 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
+[[package]]
+name = "chrono"
+version = "0.4.31"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7f2c685bad3eb3d45a01354cedb7d5faa66194d1d58ba6e267a8de788f79db38"
+dependencies = [
+ "android-tzdata",
+ "iana-time-zone",
+ "js-sys",
+ "num-traits",
+ "wasm-bindgen",
+ "windows-targets 0.48.5",
+]
+
 [[package]]
 name = "clap"
 version = "4.4.11"
@@ -258,6 +287,12 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "acbf1af155f9b9ef647e42cdc158db4b64a1b61f743629225fde6f3e0be2a7c7"
 
+[[package]]
+name = "core-foundation-sys"
+version = "0.8.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "06ea2b9bc92be3c2baa9334a323ebca2d6f074ff852cd1d7b11064035cd3868f"
+
 [[package]]
 name = "crc32fast"
 version = "1.3.2"
@@ -730,6 +765,29 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "iana-time-zone"
+version = "0.1.58"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8326b86b6cff230b97d0d312a6c40a60726df3332e721f72a1b035f451663b20"
+dependencies = [
+ "android_system_properties",
+ "core-foundation-sys",
+ "iana-time-zone-haiku",
+ "js-sys",
+ "wasm-bindgen",
+ "windows-core",
+]
+
+[[package]]
+name = "iana-time-zone-haiku"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f31827a206f56af32e590ba56d5d2d085f558508192593743f16b2306495269f"
+dependencies = [
+ "cc",
+]
+
 [[package]]
 name = "indexmap"
 version = "2.1.0"
@@ -869,6 +927,15 @@ dependencies = [
  "getrandom",
 ]
 
+[[package]]
+name = "num-traits"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "39e3200413f237f41ab11ad6d161bc7239c84dcb631773ccd7de3dfe4b5c267c"
+dependencies = [
+ "autocfg",
+]
+
 [[package]]
 name = "num_cpus"
 version = "1.16.0"
@@ -1195,6 +1262,7 @@ name = "satty"
 version = "0.8.3"
 dependencies = [
  "anyhow",
+ "chrono",
  "clap",
  "clap_complete",
  "clap_complete_fig",
@@ -1611,6 +1679,15 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 
+[[package]]
+name = "windows-core"
+version = "0.51.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f1f8cf84f35d2db49a46868f947758c7a1138116f7fac3bc844f43ade1292e64"
+dependencies = [
+ "windows-targets 0.48.5",
+]
+
 [[package]]
 name = "windows-sys"
 version = "0.48.0"
diff --git a/Cargo.toml b/Cargo.toml
index ee0d456..4fa7c1a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -36,6 +36,8 @@ toml = "0.8.8"
 serde = "1.0"
 serde_derive = "1.0"
 hex_color = {version = "3", features = ["serde"]}
+chrono = "0.4.31"
+
 
 [dependencies.relm4-icons]
 version = "0.6.0"
diff --git a/src/configuration.rs b/src/configuration.rs
index deacc82..16df058 100644
--- a/src/configuration.rs
+++ b/src/configuration.rs
@@ -131,7 +131,9 @@ impl Configuration {
         if let Some(v) = general.copy_command {
             self.copy_command = Some(v);
         }
-        // output_filename is not yet supported
+        if let Some(v) = general.output_filename {
+            self.output_filename = Some(v);
+        }
         if let Some(v) = general.annotation_size_factor {
             self.annotation_size_factor = v;
         }
@@ -247,6 +249,7 @@ struct ConfiguationFileGeneral {
     initial_tool: Option<Tools>,
     copy_command: Option<String>,
     annotation_size_factor: Option<f64>,
+    output_filename: Option<String>,
 }
 
 #[derive(Deserialize)]
diff --git a/src/sketch_board.rs b/src/sketch_board.rs
index c13dcb4..6f4edc1 100644
--- a/src/sketch_board.rs
+++ b/src/sketch_board.rs
@@ -1,4 +1,5 @@
 use anyhow::anyhow;
+use chrono::format::strftime;
 use gdk_pixbuf::Pixbuf;
 use std::cell::RefCell;
 use std::fs;
@@ -151,6 +152,9 @@ impl SketchBoard {
             Some(o) => o.clone(),
         };
 
+        // run the output filename by "chrono date format"
+        let output_filename = format!("{}", chrono::Local::now().format(&output_filename));
+
         if !output_filename.ends_with(".png") {
             let msg = "The only supported format is png, but the filename does not end in png";
             println!("{msg}");