diff --git a/html/script.js b/html/script.js
index 2a24c2f..9454227 100644
--- a/html/script.js
+++ b/html/script.js
@@ -2690,7 +2690,7 @@ function refreshSelected() {
     if (showTrace) {
         if (selected.position_time) {
             const date = new Date(selected.position_time * 1000);
-            let timestamp = utcTimesHistoric ? zuluTime(date) : (lDateString(date) + ' ' + localTime(date) + NBSP + TIMEZONE);
+            let timestamp = utcTimesHistoric ? (zuluTime(date) + NBSP + 'Z') : (lDateString(date) + ' ' + localTime(date) + NBSP + TIMEZONE);
             jQuery('#trace_time').updateText('Time:\n' + timestamp);
         } else {
             jQuery('#trace_time').updateText('Time:\n');
@@ -6696,7 +6696,7 @@ function replayOnSliderMove() {
     date.setUTCSeconds(Number(replay.seconds));
     if (true || utcTimesHistoric) {
         jQuery("#replayDateHint").html("Date: " + zDateString(date));
-        jQuery("#replayTimeHint").html("Time: " + zuluTime(date));
+        jQuery("#replayTimeHint").html("Time: " + zuluTime(date) + NBSP + 'Z');
     } else {
         jQuery("#replayDateHint").html("Date: " + lDateString(date));
         jQuery("#replayTimeHint").html("Time: " + localTime(date) + NBSP + TIMEZONE);
@@ -6733,7 +6733,7 @@ function replaySetTimeHint(arg) {
     let timeString;
     if (true || utcTimesHistoric) {
         dateString = zDateString(replay.ts);
-        timeString = zuluTime(replay.ts);
+        timeString = zuluTime(replay.ts) + NBSP + 'Z';
     } else {
         dateString = lDateString(replay.ts);
         timeString = localTime(replay.ts) + NBSP + TIMEZONE;