diff --git a/frontend-js/src/main/js/GuiConnector.js b/frontend-js/src/main/js/GuiConnector.js
index 922e962c0572e9bce98f349f983bd231abb19676..007cd26a656eb80cdf9cba725e1f46561a968dcd 100644
--- a/frontend-js/src/main/js/GuiConnector.js
+++ b/frontend-js/src/main/js/GuiConnector.js
@@ -290,7 +290,7 @@ GuiConnector.prototype.gatherReportData = function () {
         tooltip: 'Your browser user agent. Many issues are specific to certain browsers. This information is important to identify those.'
       },
       timestamp: {
-        value: +new Date(),
+        value: Math.floor(+new Date() / 1000),
         tooltip: 'The error time. This information is useful to link the issue to a specific event on the server.'
       } // TODO: Submission time rather than server time for now
     };
@@ -339,7 +339,7 @@ GuiConnector.prototype.alert = function (error, redirectIfSecurityError) {
         self._errorDialogData.innerHTML += '<textarea id="report-comment" maxlength="255" placeholder="Add comment..."></textarea>';
         Object.keys(data).forEach(function (key) {
           self._errorDialogData.innerHTML += '<label>' +
-            (key === 'timestamp' ? new Date(data[key].value) : data[key].value) +
+            (key === 'timestamp' ? new Date(data[key].value * 1000) : data[key].value) +
             '<input class="report-check" type="checkbox" data-key="' + key + '" data-value="' + data[key].value + '"/>' +
             '<span class="ui-icon ui-icon-info" title="' + data[key].tooltip + '"></span>' +
             '</label>';