diff --git a/.changeset/fix-message-separator-today-label.md b/.changeset/fix-message-separator-today-label.md
new file mode 100644
index 0000000000000..2c01c36eb35c6
--- /dev/null
+++ b/.changeset/fix-message-separator-today-label.md
@@ -0,0 +1,5 @@
+---
+'@rocket.chat/livechat': patch
+---
+
+fix(livechat): show "Today"/"Yesterday" labels in message date separator instead of full date
diff --git a/packages/livechat/src/components/Messages/MessageSeparator/index.tsx b/packages/livechat/src/components/Messages/MessageSeparator/index.tsx
index 42b69a5e7200a..5402b9e87272a 100644
--- a/packages/livechat/src/components/Messages/MessageSeparator/index.tsx
+++ b/packages/livechat/src/components/Messages/MessageSeparator/index.tsx
@@ -1,3 +1,4 @@
+import { isToday, isYesterday } from 'date-fns';
 import type { TFunction } from 'i18next';
 import type { CSSProperties } from 'preact/compat';
 import { memo } from 'preact/compat';
@@ -15,6 +16,16 @@ type MessageSeparatorProps = {
 	use?: any;
 };
 
+const formatDateLabel = (date: string, t: TFunction): string => {
+	const d = new Date(date);
+	if (isToday(d)) return t('today').toUpperCase();
+	if (isYesterday(d)) return t('yesterday').toUpperCase();
+	return t('message_separator_date', {
+		val: d,
+		formatParams: { val: { month: 'short', day: '2-digit', year: 'numeric' } },
+	}).toUpperCase();
+};
+
 // TODO: find a better way to pass `use` and do not default to a string
 // eslint-disable-next-line @typescript-eslint/naming-convention
 const MessageSeparator = ({ date, unread, use: Element = 'div', className, style = {}, t }: MessageSeparatorProps) => (
@@ -33,14 +44,7 @@ const MessageSeparator = ({ date, unread, use: Element = 'div', className, style
 		<hr className={createClassName(styles, 'separator__line')} />
 		{(date || unread) && (
 			<span className={createClassName(styles, 'separator__text')}>
-				{(!!date &&
-					t('message_separator_date', {
-						val: new Date(date),
-						formatParams: {
-							val: { month: 'short', day: '2-digit', year: 'numeric' },
-						},
-					}).toUpperCase()) ||
-					(unread && t('unread_messages'))}
+				{(!!date && formatDateLabel(date, t)) || (unread && t('unread_messages'))}
 			</span>
 		)}
 		<hr className={createClassName(styles, 'separator__line')} />
diff --git a/packages/livechat/src/i18n/en.json b/packages/livechat/src/i18n/en.json
index c4af354b49c45..1dc60beef97d7 100644
--- a/packages/livechat/src/i18n/en.json
+++ b/packages/livechat/src/i18n/en.json
@@ -59,6 +59,8 @@
     "message": "Message",
     "messages": "Messages",
     "message_separator_date": "{{val, datetime}}",
+    "today": "Today",
+    "yesterday": "Yesterday",
     "message_time": "{{val, datetime}}",
     "minimize_chat": "Minimize chat",
     "name": "Name",