diff --git a/apps.json b/apps.json
index e0f5142af..3bdc55f07 100644
--- a/apps.json
+++ b/apps.json
@@ -892,7 +892,7 @@
   { "id": "marioclock",
     "name": "Mario Clock",
     "icon": "marioclock.png",
-    "version":"0.04",
+    "version":"0.05",
     "description": "Animated Mario clock, jumps to change the time!",
     "tags": "clock,mario,retro",
     "type": "clock",
diff --git a/apps/marioclock/ChangeLog b/apps/marioclock/ChangeLog
index 4334ad92c..74db9bc18 100644
--- a/apps/marioclock/ChangeLog
+++ b/apps/marioclock/ChangeLog
@@ -2,3 +2,4 @@
 0.02: Fix day of the week and add padding
 0.03: use short date format from locale, take timeout from settings
 0.04: modify date to display to be more at the original idea but still localized
+0.05: use 12/24 hour clock from settings
diff --git a/apps/marioclock/marioclock-app.js b/apps/marioclock/marioclock-app.js
index ecbaba38a..2eeb21c97 100644
--- a/apps/marioclock/marioclock-app.js
+++ b/apps/marioclock/marioclock-app.js
@@ -1,14 +1,15 @@
 /**********************************
-  BangleJS MARIO CLOCK V0.1.0
+  BangleJS MARIO CLOCK
   + Based on Espruino Mario Clock V3 https://github.com/paulcockrell/espruino-mario-clock
   + Converting images to 1bit BMP: Image > Mode > Indexed and tick the "Use black and white (1-bit) palette", Then export as BMP.
   + Online Image convertor: https://www.espruino.com/Image+Converter
 **********************************/
 
-var locale = require("locale");
+const locale = require("locale");
 const storage = require('Storage');
-const settings = (storage.readJSON('setting.json',1)||{});
-const timeout = settings.timeout||10;
+const settings = (storage.readJSON('setting.json', 1) || {});
+const timeout = settings.timeout || 10;
+const is12Hour = settings["12hour"] || false;
 
 // Screen dimensions
 let W, H;
@@ -273,7 +274,8 @@ function drawTime() {
   drawBrick(42, 25);
 
   const t = new Date();
-  const hours = ("0" + t.getHours()).substr(-2);
+  const h = t.getHours();
+  const hours = ("0" + ((is12Hour && h > 12) ? h - 12 : h)).substr(-2);
   const mins = ("0" + t.getMinutes()).substr(-2);
 
   g.setFont("6x8");
@@ -374,8 +376,9 @@ function init() {
       Bangle.setLCDPower(true);
     }
   });
+
+  startTimers();
 }
 
 // Initialise!
 init();
-startTimers();