diff --git a/Userland/Applications/ClockSettings/ClockSettingsWidget.cpp b/Userland/Applications/ClockSettings/ClockSettingsWidget.cpp
index 9c8dc78eb52..f344c6d910a 100644
--- a/Userland/Applications/ClockSettings/ClockSettingsWidget.cpp
+++ b/Userland/Applications/ClockSettings/ClockSettingsWidget.cpp
@@ -7,6 +7,7 @@
 #include "ClockSettingsWidget.h"
 #include <Applications/ClockSettings/ClockSettingsWidgetGML.h>
 #include <LibConfig/Client.h>
+#include <LibGUI/CheckBox.h>
 #include <LibGUI/RadioButton.h>
 #include <LibGUI/TextBox.h>
 
@@ -16,6 +17,7 @@ ClockSettingsWidget::ClockSettingsWidget()
 
     m_24_hour_radio = *find_descendant_of_type_named<GUI::RadioButton>("24hour_radio");
     auto& twelve_hour_radio = *find_descendant_of_type_named<GUI::RadioButton>("12hour_radio");
+    m_show_seconds_checkbox = *find_descendant_of_type_named<GUI::CheckBox>("seconds_checkbox");
     auto& custom_radio = *find_descendant_of_type_named<GUI::RadioButton>("custom_radio");
     custom_radio.set_checked(true);
 
@@ -23,16 +25,23 @@ ClockSettingsWidget::ClockSettingsWidget()
     m_custom_format_input->set_text(Config::read_string("Taskbar", "Clock", "TimeFormat"));
 
     m_24_hour_radio->on_checked = [&](bool) {
+        m_show_seconds_checkbox->set_enabled(true);
         m_custom_format_input->set_enabled(false);
-        m_custom_format_input->set_text("%T");
+        update_time_format_string();
     };
 
     twelve_hour_radio.on_checked = [&](bool) {
+        m_show_seconds_checkbox->set_enabled(true);
         m_custom_format_input->set_enabled(false);
-        m_custom_format_input->set_text("%I:%M %p");
+        update_time_format_string();
+    };
+
+    m_show_seconds_checkbox->on_checked = [&](bool) {
+        update_time_format_string();
     };
 
     custom_radio.on_checked = [&](bool) {
+        m_show_seconds_checkbox->set_enabled(false);
         m_custom_format_input->set_enabled(true);
     };
 }
@@ -45,5 +54,15 @@ void ClockSettingsWidget::apply_settings()
 void ClockSettingsWidget::reset_default_values()
 {
     m_24_hour_radio->set_checked(true);
+    m_show_seconds_checkbox->set_checked(true);
     Config::write_string("Taskbar", "Clock", "TimeFormat", "%T");
 }
+
+void ClockSettingsWidget::update_time_format_string()
+{
+    bool show_seconds = m_show_seconds_checkbox->is_checked();
+    if (m_24_hour_radio->is_checked())
+        m_custom_format_input->set_text(show_seconds ? "%T" : "%R");
+    else
+        m_custom_format_input->set_text(show_seconds ? "%r" : "%I:%M %p");
+}
diff --git a/Userland/Applications/ClockSettings/ClockSettingsWidget.gml b/Userland/Applications/ClockSettings/ClockSettingsWidget.gml
index f6f66dc92db..6697bc6f190 100644
--- a/Userland/Applications/ClockSettings/ClockSettingsWidget.gml
+++ b/Userland/Applications/ClockSettings/ClockSettingsWidget.gml
@@ -8,7 +8,7 @@
     @GUI::GroupBox {
         title: "Time Format"
         shrink_to_fit: false
-        fixed_height: 160
+        fixed_height: 200
         layout: @GUI::VerticalBoxLayout {
             margins: [16, 8, 8]
         }
@@ -26,14 +26,21 @@
 
             @GUI::RadioButton {
                 name: "24hour_radio"
-                text: "24-hour (12:34:56)"
+                text: "24-hour"
             }
 
             @GUI::RadioButton {
                 name: "12hour_radio"
-                text: "12-hour (12:34 a.m)"
+                text: "12-hour"
             }
 
+            @GUI::CheckBox {
+                name: "seconds_checkbox"
+                text: "Show seconds"
+            }
+
+            @GUI::HorizontalSeparator {}
+
             @GUI::RadioButton {
                 name: "custom_radio"
                 text: "Custom:"
diff --git a/Userland/Applications/ClockSettings/ClockSettingsWidget.h b/Userland/Applications/ClockSettings/ClockSettingsWidget.h
index 35f5becc62b..3017b489e66 100644
--- a/Userland/Applications/ClockSettings/ClockSettingsWidget.h
+++ b/Userland/Applications/ClockSettings/ClockSettingsWidget.h
@@ -18,7 +18,10 @@ private:
     virtual void apply_settings() override;
     virtual void reset_default_values() override;
 
+    void update_time_format_string();
+
     RefPtr<GUI::RadioButton> m_24_hour_radio;
+    RefPtr<GUI::CheckBox> m_show_seconds_checkbox;
     RefPtr<GUI::TextBox> m_custom_format_input;
 
     String m_date_format;