diff --git a/apps/a_clock_timer/ChangeLog b/apps/a_clock_timer/ChangeLog
index 262f30295..cfb53c432 100644
--- a/apps/a_clock_timer/ChangeLog
+++ b/apps/a_clock_timer/ChangeLog
@@ -1,3 +1,4 @@
 0.01: Beta version for Bangle 2 (2021/11/28)
 0.02: Shows night time on the map (2022/12/28)
 0.03: Add 1 minute timer with upper taps (2023/01/05)
+1.00: Page to set up custom time zones (2023/01/06)
\ No newline at end of file
diff --git a/apps/a_clock_timer/README.md b/apps/a_clock_timer/README.md
index 3fcc00b28..c9c5793f4 100644
--- a/apps/a_clock_timer/README.md
+++ b/apps/a_clock_timer/README.md
@@ -8,11 +8,11 @@
   *  Bottom Left tap: decrease by 5 minutes
   *  Short buzz at T-30, T-20, T-10 ; Double buzz at T
 * Other time zones
-  *  Currently hardcoded to Paris and Tokyo (this will be customizable in a future version)
+  *  Showing Paris and Tokyo by default, but you can customize this using the dedicated configuration page on the app store
 * World Map
   *  The map shows day and night on Earth and the position of the Sun (yellow line)
 
 ![](screenshot.png)
 
 ## Creator
-[@alainsaas](https://github.com/alainsaas)
+[@alainsaas](https://github.com/alainsaas)
\ No newline at end of file
diff --git a/apps/a_clock_timer/app.js b/apps/a_clock_timer/app.js
index 441229842..0667e9bb0 100644
--- a/apps/a_clock_timer/app.js
+++ b/apps/a_clock_timer/app.js
@@ -89,6 +89,7 @@ function showWelcomeMessage() {
 }
 
 // time
+var offsets = require("Storage").readJSON("a_clock_timer.settings.json") || [ ["PAR",1], ["TYO",9] ];
 var drawTimeout;
 
 function getGmt() {
@@ -138,8 +139,8 @@ function draw() {
   g.setFont("Michroma36").drawString(locale.time(date,1), g.getWidth()/2, 46);
   g.setFont("6x8");
   g.drawString(locale.date(new Date(),1), 125, 68);
-  g.drawString("PAR "+locale.time(getTimeFromTimezone(1),1), 125, 80);
-  g.drawString("TYO "+locale.time(getTimeFromTimezone(9),1), 125, 88);
+  g.drawString(offsets[0][0]+" "+locale.time(getTimeFromTimezone(offsets[0][1]),1), 125, 80);
+  g.drawString(offsets[1][0]+" "+locale.time(getTimeFromTimezone(offsets[1][1]),1), 125, 88);
 
   queueNextDraw();
 }
@@ -150,4 +151,4 @@ draw();
 Bangle.setUI("clock");
 Bangle.loadWidgets();
 Bangle.drawWidgets();
-showWelcomeMessage();
+showWelcomeMessage();
\ No newline at end of file
diff --git a/apps/a_clock_timer/custom.html b/apps/a_clock_timer/custom.html
new file mode 100644
index 000000000..34a512fe6
--- /dev/null
+++ b/apps/a_clock_timer/custom.html
@@ -0,0 +1,59 @@
+<html>
+  <head>
+    <link rel="stylesheet" href="../../css/spectre.min.css">
+  </head>
+  <body>
+      <p>You can set the 2 additional timezones displayed by the clock.</p>
+      <table id="a_clock_timer-offsets">
+          <tr>
+          <th>Name</th>
+          <th>UTC Offset (Hours)</th>
+          </tr>
+      </table>
+    <p>Click <button id="upload" class="btn btn-primary">Upload</button></p>
+    <script src="../../core/lib/customize.js"></script>
+    <script>
+      var offsets=[];
+      try{
+          var stored = localStorage.getItem('a_clock_timer-offset-list')
+          if(stored) offsets = JSON.parse(stored);
+          if (!offsets || offsets.length!=2) {
+              throw "Offsets invalid";
+          }
+        } catch(e){
+            offsets=[
+                ["PAR",1],
+                ["TYO",9],
+           ];
+        }
+      console.log(offsets);
+      var tbl=document.getElementById("a_clock_timer-offsets");
+      for (var i=0; i<2; i++) {
+        var $offset = document.createElement('tr')
+        $offset.innerHTML = `
+            <td><input type="text" size="4" maxlength="3" id="name_${i}" value="${offsets[i][0]}"></td>
+            <td><input type="number" id="offset_${i}" value="${offsets[i][1]}"></td>`
+        tbl.append($offset);
+      }
+      document.getElementById("upload").addEventListener("click", function() {
+          var storage_offsets=[];
+          var app_offsets=[];
+          for (var i=0; i<2; i++) {
+              var name=document.getElementById("name_"+i).value;
+              var offset=document.getElementById("offset_"+i).value;
+              if (checked) {
+                  app_offsets.push([name,offset]);
+              }
+          }
+          console.log(storage_offsets);
+          console.log(app_offsets);
+        localStorage.setItem('a_clock_timer-offset-list',JSON.stringify(storage_offsets));
+        sendCustomizedApp({
+          storage:[
+            {name:"a_clock_timer.settings.json", content:JSON.stringify(app_offsets)},
+          ]
+        });
+      });
+    </script>
+  </body>
+</html>
\ No newline at end of file
diff --git a/apps/a_clock_timer/metadata.json b/apps/a_clock_timer/metadata.json
index 4e7a36b8a..ce9429e6a 100644
--- a/apps/a_clock_timer/metadata.json
+++ b/apps/a_clock_timer/metadata.json
@@ -1,7 +1,7 @@
 {
   "id": "a_clock_timer",
   "name": "A Clock with Timer",
-  "version": "0.03",
+  "version": "1.00",
   "description": "A Clock with Timer, Map and Time Zones",
   "icon": "app.png",
   "screenshots": [{"url":"screenshot.png"}],
@@ -10,8 +10,10 @@
   "supports": ["BANGLEJS2"],
   "allow_emulator": true,
   "readme": "README.md",
+  "custom": "custom.html",
   "storage": [
     {"name":"a_clock_timer.app.js","url":"app.js"},
     {"name":"a_clock_timer.img","url":"app-icon.js","evaluate":true}
-  ]
-}
+  ],
+  "data": [{"name":"a_clock_timer.settings.json"}]
+}
\ No newline at end of file
