diff --git a/_locales/en/messages.json b/_locales/en/messages.json
index 984a2c1b..55970dee 100755
--- a/_locales/en/messages.json
+++ b/_locales/en/messages.json
@@ -1017,7 +1017,7 @@
         "message": "Timezone Offset"
     },
     "tzOffsetHelp": {
-        "message": "Time zone offset from UTC, in minutes. This is applied to the GPS time for logging and time-stamping of Blackbox logs. (Default = 0)"
+        "message": "Time zone offset from UTC. This is applied to the GPS time for logging and time-stamping of Blackbox logs. (Default = 0 mins)"
     },
     "tzAutomaticDST": {
         "message": "Automatic Daylight Savings Time"
diff --git a/js/settings.js b/js/settings.js
index 32af14bc..ae797f76 100644
--- a/js/settings.js
+++ b/js/settings.js
@@ -312,7 +312,7 @@ var Settings = (function () {
             'mins'      : 'Minutes',
             'hours'     : 'Hours',
             'tzmins'    : 'Minutes',
-            'tzhours'   : 'Hours:Mins'
+            'tzhours'   : 'Hours:Minutes',
             // Angles
             'deg'           : 'Degrees',
             'decideg'       : 'DeciDegrees',
@@ -537,10 +537,11 @@ var Settings = (function () {
         } else if (multiplier === 'TZHOURS') {
             element.removeAttr('min');
             element.removeAttr('max');
+            element.attr('type', 'text');
             element.attr('pattern', '[0-9]{2}:[0-9]{2}');
             let hours = Math.floor(oldValue/60);
             let mins = oldValue - (hours*60);
-            newValue = hours + ':' + mins;
+            newValue = padZeros(hours, 2) + ':' + padZeros(mins, 2);
         } else {
             newValue = Number((oldValue / multiplier)).toFixed(decimalPlaces);
         }
@@ -579,7 +580,7 @@ var Settings = (function () {
                 value = Math.round(((parseFloat(input.val())-32) / 1.8) * 10);
             } else if (multiplier === 'TZHOURS') {
                 let inputTZ = input.val().split(':');
-                value = (inputTZ[0] * 60) + inputTZ[1];
+                value = (parseInt(inputTZ[0]) * 60) + parseInt(inputTZ[1]);
             } else {
                 multiplier = parseFloat(multiplier);
                 
diff --git a/main.js b/main.js
index b365b96a..d27b0a07 100644
--- a/main.js
+++ b/main.js
@@ -649,6 +649,11 @@ String.prototype.format = function () {
     });
 };
 
+function padZeros(val, length) {
+    let str = val.toString();
+    return str.length < length ? padZeros("0" + str, length) : str;
+};
+
 function updateActivatedTab() {
     var activeTab = $('#tabs > ul li.active');
     activeTab.removeClass('active');