diff --git a/docs/modules/Clock.md b/docs/modules/Clock.md
index a513987..13932c7 100644
--- a/docs/modules/Clock.md
+++ b/docs/modules/Clock.md
@@ -8,9 +8,12 @@ Clicking on the widget opens a popup with the time and a calendar.
 
 > Type: `clock`
 
-| Name     | Type     | Default          | Description                                                                                                                              |
-|----------|----------|------------------|------------------------------------------------------------------------------------------------------------------------------------------|
-| `format` | `string` | `%d/%m/%Y %H:%M` | Date/time format string. Detail on available tokens can be found here: <https://docs.rs/chrono/latest/chrono/format/strftime/index.html> |
+| Name           | Type     | Default          | Description                                             |
+|----------------|----------|------------------|---------------------------------------------------------|
+| `format`       | `string` | `%d/%m/%Y %H:%M` | Date/time format string.                                |
+| `format_popup` | `string` | `%H:%M:%S`       | Date/time format string to display in the popup header. |
+
+> Detail on available tokens can be found here: <https://docs.rs/chrono/latest/chrono/format/strftime/index.html>
 
 <details>
 <summary>JSON</summary>
diff --git a/src/modules/clock.rs b/src/modules/clock.rs
index 4102f92..e974466 100644
--- a/src/modules/clock.rs
+++ b/src/modules/clock.rs
@@ -23,6 +23,9 @@ pub struct ClockModule {
     #[serde(default = "default_format")]
     format: String,
 
+    #[serde(default = "default_popup_format")]
+    format_popup: String,
+
     #[serde(flatten)]
     pub common: Option<CommonConfig>,
 }
@@ -31,6 +34,10 @@ fn default_format() -> String {
     String::from("%d/%m/%Y %H:%M")
 }
 
+fn default_popup_format() -> String {
+    String::from("%H:%M:%S")
+}
+
 impl Module<Button> for ClockModule {
     type SendMessage = DateTime<Local>;
     type ReceiveMessage = ();
@@ -75,13 +82,12 @@ impl Module<Button> for ClockModule {
         });
 
         let format = self.format.clone();
-        {
-            context.widget_rx.attach(None, move |date| {
-                let date_string = format!("{}", date.format(&format));
-                label.set_label(&date_string);
-                Continue(true)
-            });
-        }
+
+        context.widget_rx.attach(None, move |date| {
+            let date_string = format!("{}", date.format(&format));
+            label.set_label(&date_string);
+            Continue(true)
+        });
 
         let popup = self.into_popup(context.controller_tx, context.popup_rx, info);
 
@@ -101,7 +107,6 @@ impl Module<Button> for ClockModule {
 
         let clock = Label::builder().halign(Align::Center).build();
         add_class(&clock, "calendar-clock");
-        let format = "%H:%M:%S";
 
         container.add(&clock);
 
@@ -109,13 +114,12 @@ impl Module<Button> for ClockModule {
         add_class(&calendar, "calendar");
         container.add(&calendar);
 
-        {
-            rx.attach(None, move |date| {
-                let date_string = format!("{}", date.format(format));
-                clock.set_label(&date_string);
-                Continue(true)
-            });
-        }
+        let format = self.format_popup;
+        rx.attach(None, move |date| {
+            let date_string = format!("{}", date.format(&format));
+            clock.set_label(&date_string);
+            Continue(true)
+        });
 
         container.show_all();