diff --git a/install/package.json b/install/package.json
index 5b7b2fde65..b96dea923a 100644
--- a/install/package.json
+++ b/install/package.json
@@ -102,7 +102,7 @@
         "nodebb-plugin-ntfy": "1.7.3",
         "nodebb-plugin-spam-be-gone": "2.2.0",
         "nodebb-rewards-essentials": "1.0.0",
-        "nodebb-theme-harmony": "1.1.90",
+        "nodebb-theme-harmony": "1.1.91",
         "nodebb-theme-lavender": "7.1.5",
         "nodebb-theme-peace": "2.1.23",
         "nodebb-theme-persona": "13.2.42",
diff --git a/public/src/client/topic/threadTools.js b/public/src/client/topic/threadTools.js
index 715af804d2..60dfd8b766 100644
--- a/public/src/client/topic/threadTools.js
+++ b/public/src/client/topic/threadTools.js
@@ -257,7 +257,6 @@ define('forum/topic/threadTools', [
 				title: '[[topic:thread-tools.pin]]',
 				message: html,
 				onEscape: true,
-				size: 'small',
 				buttons: {
 					cancel: {
 						label: '[[modules:bootbox.cancel]]',
@@ -267,19 +266,19 @@ define('forum/topic/threadTools', [
 						label: '[[global:save]]',
 						className: 'btn-primary',
 						callback: function () {
-							const expiryEl = modal.get(0).querySelector('#expiry');
-							let expiry = expiryEl.value;
-
+							const expiryDateEl = modal.get(0).querySelector('#expiry-date');
+							const expiryTimeEl = modal.get(0).querySelector('#expiry-time');
+							let expiryDate = expiryDateEl.value;
+							let expiryTime = expiryTimeEl.value;
 							// No expiry set
-							if (expiry === '') {
+							if (expiryDate === '' && expiryTime === '') {
 								return onSuccess();
 							}
-
-							// Expiration date set
-							expiry = new Date(expiry);
-
-							if (expiry && expiry.getTime() > Date.now()) {
-								body.expiry = expiry.getTime();
+							expiryDate = expiryDate || new Date().toDateString();
+							expiryTime = expiryTime || new Date().toTimeString();
+							const date = new Date(`${expiryDate} ${expiryTime}`);
+							if (date.getTime() > Date.now()) {
+								body.expiry = date.getTime();
 								onSuccess();
 							} else {
 								alerts.error('[[error:invalid-date]]');
diff --git a/public/src/modules/helpers.common.js b/public/src/modules/helpers.common.js
index 07ab724963..ab61734efa 100644
--- a/public/src/modules/helpers.common.js
+++ b/public/src/modules/helpers.common.js
@@ -343,8 +343,11 @@ module.exports = function (utils, Benchpress, relative_path) {
 		return `[[topic:wrote-${langSuffix}, ${relative_path}/post/${post.pid}, ${post.timestampISO}]]`;
 	}
 
-	function isoTimeToLocaleString(isoTime) {
-		return new Date(isoTime).toLocaleString().replace(/,/g, ',');
+	function isoTimeToLocaleString(isoTime, locale = 'en-GB') {
+		return new Date(isoTime).toLocaleString([locale], {
+			dateStyle: 'short',
+			timeStyle: 'short',
+		}).replace(/,/g, ',');
 	}
 
 	function shouldHideReplyContainer(post) {
diff --git a/src/views/modals/set-pin-expiry.tpl b/src/views/modals/set-pin-expiry.tpl
index 523723011e..75fb877cd2 100644
--- a/src/views/modals/set-pin-expiry.tpl
+++ b/src/views/modals/set-pin-expiry.tpl
@@ -1,5 +1,8 @@
 <div class="form-group">
 	<label class="form-label" for="expiry">[[topic:pin-modal-expiry]]</label>
-	<input id="expiry" type="date" class="form-control" />
+	<div class="d-flex gap-1">
+		<input id="expiry-date" type="date" class="form-control" />
+		<input id="expiry-time" type="time" class="form-control" />
+	</div>
 	<p class="form-text">[[topic:pin-modal-help]]</p>
 </div>
\ No newline at end of file