diff --git a/addons/calendar/data/mail_template_data.xml b/addons/calendar/data/mail_template_data.xml
index 887afb037ac..cb390fb6e94 100644
--- a/addons/calendar/data/mail_template_data.xml
+++ b/addons/calendar/data/mail_template_data.xml
@@ -369,7 +369,7 @@
     <t t-set="target_responsible" t-value="object.partner_id == object.partner_id" />
     <t t-set="target_customer" t-value="object.partner_id == customer" />
     <t t-set="recurrent" t-value="object.recurrence_id and not ctx.get('calendar_template_ignore_recurrence')" />
-    <t t-set="mail_tz" t-value="ctx.get('mail_tz')" />
+    <t t-set="mail_tz" t-value="object._get_mail_tz() or ctx.get('mail_tz')" />
     <div>
         <table border="0" cellpadding="0" cellspacing="0">
             <tr>
diff --git a/addons/calendar/i18n/calendar.pot b/addons/calendar/i18n/calendar.pot
index f1ccb47737f..e096df98b0d 100644
--- a/addons/calendar/i18n/calendar.pot
+++ b/addons/calendar/i18n/calendar.pot
@@ -173,11 +173,11 @@ msgstr ""
 msgid ""
 "<div>\n"
 "    <t t-set=\"colors\" t-value=\"{'needsAction': 'grey', 'accepted': 'green', 'tentative': '#FFFF00', 'declined': 'red'}\"/>\n"
-"    <t t-set=\"is_online = 'appointment_type_id' in object and object.appointment_type_id\"/>\n"
-"    <t t-set=\"target_responsible = object.partner_id == object.partner_id\"/>\n"
-"    <t t-set=\"target_customer = object.partner_id == customer\"/>\n"
-"    <t t-set=\"recurrent = object.recurrence_id and not ctx.get('calendar_template_ignore_recurrence'\"/>\n"
-"    <t t-set=\"mail_tz = ctx.get('mail_tz')\"/>\n"
+"    <t t-set=\"is_online\" t-value=\"'appointment_type_id' in object and object.appointment_type_id\"/>\n"
+"    <t t-set=\"target_responsible\" t-value=\"object.partner_id == object.partner_id\"/>\n"
+"    <t t-set=\"target_customer\" t-value=\"object.partner_id == customer\"/>\n"
+"    <t t-set=\"recurrent\" t-value=\"object.recurrence_id and not ctx.get('calendar_template_ignore_recurrence')\"/>\n"
+"    <t t-set=\"mail_tz\" t-value=\"object._get_mail_tz() or ctx.get('mail_tz')\"/>\n"
 "    <div>\n"
 "        <table border=\"0\" cellpadding=\"0\" cellspacing=\"0\">\n"
 "            <tr>\n"
@@ -272,7 +272,7 @@ msgid ""
 "        Hello <t t-out=\"object.common_name or ''\">Wood Corner</t>,<br/><br/>\n"
 "\n"
 "        <t t-if=\"is_online and target_customer\">\n"
-"            Your appointment <strong t-out=\"object.event_id.appointment_type_id.name or ''\">Schedule a Demo</strong> with <t t-out=\"object.event_id.user_id.name or ''\">Ready Mat</t> has been booked.\n"
+"            Your appointment <strong t-out=\"object.event_id.appointment_type_id.name or ''\">Schedule a Demo</strong> <t t-if=\"object.event_id.appointment_type_id.category != 'custom'\"> with <t t-out=\"object.event_id.user_id.name or ''\">Ready Mat</t></t> has been booked.\n"
 "        </t>\n"
 "        <t t-elif=\"is_online and target_responsible\">\n"
 "            <t t-if=\"customer\">\n"
diff --git a/addons/calendar/models/calendar_event.py b/addons/calendar/models/calendar_event.py
index 78415b873d4..6131bc4253f 100644
--- a/addons/calendar/models/calendar_event.py
+++ b/addons/calendar/models/calendar_event.py
@@ -722,6 +722,10 @@ class Meeting(models.Model):
         self.ensure_one()
         return ",".join([e for e in self.attendee_ids.mapped("email") if e])
 
+    def _get_mail_tz(self):
+        self.ensure_one()
+        return self.event_tz or self.env.user.tz
+
     def _sync_activities(self, fields):
         # update activities
         for event in self: