diff --git a/addons/mail/static/src/core/web/activity.js b/addons/mail/static/src/core/web/activity.js
index d509ce91ebe..4b3176213b2 100644
--- a/addons/mail/static/src/core/web/activity.js
+++ b/addons/mail/static/src/core/web/activity.js
@@ -9,6 +9,7 @@ import { AvatarCardPopover } from "@mail/discuss/web/avatar_card/avatar_card_pop
 import { Component, onMounted, onWillUnmount, useState } from "@odoo/owl";
 
 import { browser } from "@web/core/browser/browser";
+import { deserializeDateTime } from "@web/core/l10n/dates";
 import { _t } from "@web/core/l10n/translation";
 import { usePopover } from "@web/core/popover/popover_hook";
 import { useService } from "@web/core/utils/hooks";
@@ -50,6 +51,12 @@ export class Activity extends Component {
         return this.props.data.display_name;
     }
 
+    get displayCreateDate() {
+        return deserializeDateTime(this.props.data.create_date).toLocaleString(
+            luxon.DateTime.DATETIME_SHORT_WITH_SECONDS
+        );
+    }
+
     updateDelayAtNight() {
         browser.clearTimeout(this.updateDelayMidnightTimeout);
         this.updateDelayMidnightTimeout = browser.setTimeout(
diff --git a/addons/mail/static/src/core/web/activity.xml b/addons/mail/static/src/core/web/activity.xml
index b3e3cdd0ccd..e0d3ea74c47 100644
--- a/addons/mail/static/src/core/web/activity.xml
+++ b/addons/mail/static/src/core/web/activity.xml
@@ -32,7 +32,7 @@
                 <table class="o-mail-Activity-details table table-sm mt-2">
                     <tbody>
                         <tr><td class="text-end fw-bolder">Activity type</td><td><t t-esc="activity.activity_type_id[1]"/></td></tr>
-                        <tr><td class="text-end fw-bolder">Created</td><td><t t-esc="activity.create_date"/> by <t t-esc="activity.create_uid[1]"/></td></tr>
+                        <tr><td class="text-end fw-bolder">Created</td><td><t t-esc="displayCreateDate"/> by <t t-esc="activity.create_uid[1]"/></td></tr>
                         <tr><td class="text-end fw-bolder">Assigned to</td><td><t t-esc="activity.user_id[1]"/></td></tr>
                         <tr><td class="text-end fw-bolder">Due on</td><td><t t-esc="activity.date_deadline"/></td></tr>
                     </tbody>