diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7cd8284..64302d3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,10 @@ All notable changes to this project will be documented in this file.
 - Added configurable audit events for media-library assets, managed fonts, and weather icon sets.
 - Added All / Between Dates / Before Date / After Date filtering to timetable regions, with optional inclusive start-time boundaries shared by previews and playback.
 
+### Changed
+
+- Timetable date-filter inputs retain the date, hours, and minutes but omit seconds.
+
 ### Fixed
 
 - Prevented deletion of media referenced from rich-text slide content.
diff --git a/src/web/public/js/regions/type/timetable.js b/src/web/public/js/regions/type/timetable.js
index aba26d1..7a5f8f1 100644
--- a/src/web/public/js/regions/type/timetable.js
+++ b/src/web/public/js/regions/type/timetable.js
@@ -104,7 +104,7 @@
       return '';
     }
     function pad(part) { return String(part).padStart(2, '0'); }
-    return date.getFullYear() + '-' + pad(date.getMonth() + 1) + '-' + pad(date.getDate()) + 'T' + pad(date.getHours()) + ':' + pad(date.getMinutes()) + ':' + pad(date.getSeconds());
+    return date.getFullYear() + '-' + pad(date.getMonth() + 1) + '-' + pad(date.getDate()) + 'T' + pad(date.getHours()) + ':' + pad(date.getMinutes());
   }
 
   function getDateRangeConfig(regionId, card, current) {
@@ -362,7 +362,7 @@
                   var label = boundary === 'from' ? 'Starts on or after (local time)' : 'Starts on or before (local time)';
                   return '<div class="col-12 col-md-6" data-timetable-boundary' + (!enabled ? ' hidden' : '') + '>' +
                     '<label class="form-label" for="region_' + field + '_' + region.id + '">' + label + '</label>' +
-                    '<input id="region_' + field + '_' + region.id + '" type="datetime-local" step="1" class="form-control" data-timetable-date="' + field + '" value="' + escapeHtml(toLocalInput(current[field])) + '"' + (!enabled ? ' disabled' : '') + ' />' +
+                    '<input id="region_' + field + '_' + region.id + '" type="datetime-local" step="60" class="form-control" data-timetable-date="' + field + '" value="' + escapeHtml(toLocalInput(current[field])) + '"' + (!enabled ? ' disabled' : '') + ' />' +
                     '<input type="hidden" name="region_' + field + '_' + region.id + '" value="' + escapeHtml(current[field] || '') + '" />' +
                   '</div>';
                 }).join('') +
diff --git a/test/timetable-region-timezone.test.js b/test/timetable-region-timezone.test.js
index 455e4d9..6f5cb16 100644
--- a/test/timetable-region-timezone.test.js
+++ b/test/timetable-region-timezone.test.js
@@ -139,8 +139,10 @@ test('timetable date controls default to all and pass unsaved date ranges to pre
   assert.match(html, /<option value="all" selected>All<\/option>/);
   assert.match(html, /data-timetable-date-range hidden/);
   assert.match(html, /data-timetable-date="date_from"[^>]* disabled/);
-  const saved = { date_filter: 'between', date_from: '2099-08-20T10:00:00.000Z', date_to: '' };
+  const saved = { date_filter: 'between', date_from: '2099-08-20T10:00:45.000Z', date_to: '' };
   const enabled = module.renderEditorCard({ region, current: saved, timetableGroups: [] });
+  assert.equal((enabled.match(/type="datetime-local" step="60"/g) || []).length, 2);
+  assert.match(enabled, /data-timetable-date="date_from" value="\d{4}-\d{2}-\d{2}T\d{2}:\d{2}"/);
   assert.match(enabled, /<option value="between" selected>Between Dates<\/option>/);
   assert.doesNotMatch(enabled, /data-timetable-date-range hidden/);
   assert.doesNotMatch(enabled, /data-timetable-date="date_from"[^>]* disabled/);