diff --git a/jdav_web/jdav_web/settings/components/texts.py b/jdav_web/jdav_web/settings/components/texts.py
index 6371e57..0bb3ad3 100644
--- a/jdav_web/jdav_web/settings/components/texts.py
+++ b/jdav_web/jdav_web/settings/components/texts.py
@@ -22,12 +22,19 @@ der Registrierung kommst du hier:
 Viele Grüße
 Dein KOMPASS"""
 
+GROUP_TIME_AVAILABLE_TEXT = """Die Gruppenstunde findet jeden {weekday} von {start_time} bis {end_time} Uhr statt."""
+
+GROUP_TIME_UNAVAILABLE_TEXT = """Bitte erfrage die Gruppenzeiten bei der Gruppenleitung ({contact_email})."""
+
 INVITE_TEXT = """Hallo {name},
 
 wir haben gute Neuigkeiten für dich. Es ist ein Platz in der Jugendgruppe {group_name} {group_link}freigeworden.
-Wir treffen uns jeden {weekday} von {start_time} bis {end_time} Uhr.
+{group_time}
+
+Bitte kontaktiere die Gruppenleitung ({contact_email}) für alle weiteren Absprachen.
 
-Wir brauchen jetzt noch ein paar Informationen von dir und deine Anmeldebestätigung. Die lädst du herunter
+Wenn du nach der Schnupperstunde beschließt der Gruppe beizutreten, benötigen wir noch ein paar
+Informationen und deine Anmeldebestätigung von dir. Die lädst du herunter
 (siehe %(REGISTRATION_FORM_DOWNLOAD_LINK)s), lässt sie von deinen Eltern ausfüllen, unterschreiben
 und lädst ein Foto davon in unserem Anmeldeformular hoch. Das kannst du alles über folgenden Link erledigen:
 
diff --git a/jdav_web/mailer/mailutils.py b/jdav_web/mailer/mailutils.py
index 701de61..c9478de 100644
--- a/jdav_web/mailer/mailutils.py
+++ b/jdav_web/mailer/mailutils.py
@@ -7,10 +7,14 @@ import os
 NOT_SENT, SENT, PARTLY_SENT = 0, 1, 2
 
 def send(subject, content, sender, recipients, message_id=None, reply_to=None,
-         attachments=None):
+         attachments=None, cc=None):
     failed, succeeded = False, False
     if type(recipients) != list:
         recipients = [recipients]
+    if not cc:
+        cc = []
+    elif type(cc) != list:
+        cc = [cc]
     if reply_to is not None:
         kwargs = {"reply_to": reply_to}
     else:
@@ -23,7 +27,7 @@ def send(subject, content, sender, recipients, message_id=None, reply_to=None,
     # construct mails
     mails = []
     for recipient in set(recipients):
-        email = EmailMessage(subject, content, sender, [recipient],
+        email = EmailMessage(subject, content, sender, [recipient], cc=cc,
                              headers=headers, **kwargs)
         if attachments is not None:
             for attach in attachments:
diff --git a/jdav_web/members/admin.py b/jdav_web/members/admin.py
index 9da53d4..de8128f 100644
--- a/jdav_web/members/admin.py
+++ b/jdav_web/members/admin.py
@@ -170,6 +170,7 @@ class MemberAdmin(CommonAdminMixin, admin.ModelAdmin):
                 ('email', 'alternative_email'),
                 'phone_number',
                 'birth_date',
+                'gender',
                 'group', 'registration_form', 'image',
                 ('join_date', 'leave_date'),
                 'comments',
@@ -382,6 +383,7 @@ class MemberUnconfirmedAdmin(admin.ModelAdmin):
                 ('email', 'alternative_email'),
                 'phone_number',
                 'birth_date',
+                'gender',
                 'group', 'registration_form', 'image',
                 ('join_date', 'leave_date'),
                 'comments',
@@ -539,6 +541,10 @@ class MemberWaitingListAdmin(CommonAdminMixin, admin.ModelAdmin):
                 messages.error(request,
                                _("An error occurred while trying to invite said members. Please try again."))
                 return HttpResponseRedirect(request.get_full_path())
+            if not group.contact_email:
+                messages.error(request,
+                               _('The selected group does not have a contact email. Please first set a contact email and then try again.'))
+                return HttpResponseRedirect(request.get_full_path())
 
             for waiter in queryset:
                 waiter.invited_for_group = group
@@ -596,6 +602,11 @@ class MemberWaitingListAdmin(CommonAdminMixin, admin.ModelAdmin):
                                _("An error occurred while trying to invite said members. Please try again."))
                 return HttpResponseRedirect(request.get_full_path())
 
+            if not group.contact_email:
+                messages.error(request,
+                               _('The selected group does not have a contact email. Please first set a contact email and then try again.'))
+                return HttpResponseRedirect(request.get_full_path())
+
             waiter.invited_for_group = group
             waiter.save()
             waiter.invite_to_group(group)
@@ -634,7 +645,7 @@ class GroupAdminForm(forms.ModelForm):
 
 
 class GroupAdmin(CommonAdminMixin, admin.ModelAdmin):
-    fields = ['name', 'description', 'year_from', 'year_to', 'leiters', 'show_website',
+    fields = ['name', 'description', 'year_from', 'year_to', 'leiters', 'contact_email', 'show_website',
         'weekday', ('start_time', 'end_time')]
     form = GroupAdminForm
     list_display = ('name', 'year_from', 'year_to')
diff --git a/jdav_web/members/locale/de/LC_MESSAGES/django.po b/jdav_web/members/locale/de/LC_MESSAGES/django.po
index eb91978..57f0cbd 100644
--- a/jdav_web/members/locale/de/LC_MESSAGES/django.po
+++ b/jdav_web/members/locale/de/LC_MESSAGES/django.po
@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2024-11-24 22:24+0100\n"
+"POT-Creation-Date: 2024-11-27 23:16+0100\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -34,174 +34,174 @@ msgstr "Nein"
 msgid "All"
 msgstr "Alle"
 
-#: members/admin.py:183 members/admin.py:395
+#: members/admin.py:184 members/admin.py:397
 msgid "Contact information"
 msgstr "Kontaktinformationen"
 
-#: members/admin.py:188 members/admin.py:400
+#: members/admin.py:189 members/admin.py:402
 msgid "Skills"
 msgstr "Fähigkeiten"
 
-#: members/admin.py:193 members/admin.py:405
+#: members/admin.py:194 members/admin.py:407
 msgid "Others"
 msgstr "Sonstiges"
 
-#: members/admin.py:199 members/admin.py:410
+#: members/admin.py:200 members/admin.py:412
 msgid "Organizational"
 msgstr "Organisatorisches"
 
-#: members/admin.py:280
+#: members/admin.py:281
 msgid "Compose new mail to selected members"
 msgstr "Neue Nachricht an ausgewählte Teilnehmer verfassen"
 
-#: members/admin.py:286
+#: members/admin.py:287
 msgid "Echo required"
 msgstr "Rückmeldung erforderlich"
 
-#: members/admin.py:288
+#: members/admin.py:289
 msgid "Successfully requested echo from selected members."
 msgstr ""
 "Rückmeldungsaufforderung erfolgreich an ausgewählte Teilnehmer verschickt."
 
-#: members/admin.py:289
+#: members/admin.py:290
 msgid "Request echo from selected members"
 msgstr "Rückmeldungsaufforderung an ausgewählte Teilnehmer verschicken"
 
-#: members/admin.py:295
+#: members/admin.py:296
 #, python-format
 msgid "Successfully invited %(name)s as user."
 msgstr "Erfolgreich %(name)s aufgefordert Zugangsdaten zu wählen."
 
-#: members/admin.py:297
+#: members/admin.py:298
 msgid "Successfully invited selected members to join as users."
 msgstr ""
 "Erfolgreich ausgewählte Teilnehmer:innen aufgefordert Zugangsdaten zu wählen."
 
-#: members/admin.py:304 members/admin.py:321
+#: members/admin.py:305 members/admin.py:322
 msgid "Permission denied."
 msgstr "Fehlende Berechtigungen."
 
-#: members/admin.py:311 members/admin.py:340
+#: members/admin.py:312 members/admin.py:341
 #: members/templates/admin/invite_as_user.html:21
 msgid "Invite as user"
 msgstr "Kompass Zugangsdaten wählen lassen"
 
-#: members/admin.py:316
+#: members/admin.py:317
 msgid "Invite selected members to join Kompass as users."
 msgstr "Ausgewählte Teilnehmer:innen Kompass Zugangsdaten wählen lassen."
 
-#: members/admin.py:327
+#: members/admin.py:328
 msgid "Member not found."
 msgstr "Teilnehmer:in nicht gefunden."
 
-#: members/admin.py:331
+#: members/admin.py:332
 #, python-format
 msgid "%(name)s already has login data."
 msgstr "%(name)s hat schon Zugangsdaten."
 
-#: members/admin.py:345
+#: members/admin.py:346
 #, python-format
 msgid "%(name)s already has a pending invitation as user."
 msgstr ""
 "%(name)s hat bereits eine ausstehende Aufforderung Zugangsdaten zu wählen."
 
-#: members/admin.py:363
+#: members/admin.py:364
 msgid "activity"
 msgstr "Aktivität"
 
-#: members/admin.py:373 members/models.py:53 members/models.py:1390
+#: members/admin.py:374 members/models.py:53 members/models.py:1390
 msgid "Name"
 msgstr "Name"
 
-#: members/admin.py:444
+#: members/admin.py:446
 msgid "Successfully requested mail confirmation from selected registrations."
 msgstr "Aufforderung zur Bestätigung der Email Adresse versendet."
 
-#: members/admin.py:445
+#: members/admin.py:447
 msgid "Request mail confirmation from selected registrations"
 msgstr "Aufforderung zur Bestätigung der Email Adresse versenden"
 
-#: members/admin.py:452 members/admin.py:486
+#: members/admin.py:454 members/admin.py:488
 #, python-format
 msgid "Successfully confirmed %(name)s."
 msgstr "Registrierung von %(name)s erfolgreich bestätigt."
 
-#: members/admin.py:456 members/admin.py:489
+#: members/admin.py:458 members/admin.py:491
 #, python-format
 msgid "Can't confirm. %(name)s has unconfirmed email addresses."
 msgstr "Bestätigung nicht möglich. %(name)s hat unbestätigte Emailadressen."
 
-#: members/admin.py:461
+#: members/admin.py:463
 msgid "Successfully confirmed multiple registrations."
 msgstr "Erfolgreich mehrere Registrierungen bestätigt."
 
-#: members/admin.py:463
+#: members/admin.py:465
 msgid ""
 "Failed to confirm some registrations because of unconfirmed email addresses."
 msgstr ""
 "Einige Bestätigungen fehlgeschlagen, weil Emailadressen noch nicht bestätigt "
 "sind."
 
-#: members/admin.py:464
+#: members/admin.py:466
 msgid "Confirm selected registrations"
 msgstr "Ausgewählte Registrierungen bestätigen"
 
-#: members/admin.py:480
+#: members/admin.py:482
 #, python-format
 msgid "Successfully demoted %(name)s to waiter."
 msgstr "%(name)s zurück auf die Warteliste gesetzt."
 
-#: members/admin.py:481
+#: members/admin.py:483
 msgid "Demote selected registrations to waiters."
 msgstr "Ausgewählte Registrierungen zurück auf die Warteliste setzen."
 
-#: members/admin.py:496 members/models.py:380 members/models.py:729
+#: members/admin.py:498 members/models.py:380 members/models.py:729
 #: members/models.py:1135
 msgid "Group"
 msgstr "Gruppe"
 
-#: members/admin.py:530
+#: members/admin.py:532
 #, python-format
 msgid "Successfully asked %(name)s to confirm their waiting status."
 msgstr "Erfolgreich %(name)s aufgefordert den Wartelistenplatz zu bestätigen."
 
-#: members/admin.py:531
+#: members/admin.py:533
 msgid "Ask selected waiters to confirm their waiting status"
 msgstr "Wartende auffordern den Wartelistenplatz zu bestätigen"
 
-#: members/admin.py:540 members/admin.py:596
+#: members/admin.py:542 members/admin.py:598
 msgid ""
 "An error occurred while trying to invite said members. Please try again."
 msgstr ""
 "Beim Einladen dieser Personen ist ein Fehler aufgetreten. Bitte versuche es "
 "nochmal. "
 
-#: members/admin.py:548 members/admin.py:603
+#: members/admin.py:550 members/admin.py:605
 #, python-format
 msgid "Successfully invited %(name)s to %(group)s."
 msgstr "Erfolgreich %(name)s zu Gruppe %(group)s eingeladen."
 
-#: members/admin.py:552 members/admin.py:609
+#: members/admin.py:554 members/admin.py:611
 msgid "Select group for invitation"
 msgstr "Wähle Gruppe für Einladung aus"
 
-#: members/admin.py:559
+#: members/admin.py:561
 msgid "Offer waiter a place in a group."
 msgstr "Personen auf der Warteliste einen Gruppenplatz anbieten."
 
-#: members/admin.py:652
+#: members/admin.py:654
 msgid "Difficulty"
 msgstr "Schwierigkeit"
 
-#: members/admin.py:655
+#: members/admin.py:657
 msgid "Tour type"
 msgstr "Art der Tour"
 
-#: members/admin.py:658 members/models.py:945
+#: members/admin.py:660 members/models.py:945
 msgid "Means of transportation"
 msgstr "Verkehrsmittel"
 
-#: members/admin.py:684
+#: members/admin.py:686
 msgid ""
 "Please list here all expenses in relation with this excursion and upload "
 "relevant bills. These have to be permanently stored for the application of "
@@ -214,7 +214,7 @@ msgstr ""
 "einzelnen Posten wird dabei auf der LJP-Kostenübersicht angezeigt (sinnvoll "
 "wären z.B. Anreise, Verpflegung, Material etc.)."
 
-#: members/admin.py:702
+#: members/admin.py:704
 msgid ""
 "Here you can work on a seminar report for applying for financial "
 "contributions from Landesjugendplan (LJP). More information on creating a "
@@ -227,7 +227,7 @@ msgstr ""
 "wahlweise nur TN-Liste und Kostenübersicht kannst du anschließend "
 "herunterladen."
 
-#: members/admin.py:710
+#: members/admin.py:712
 msgid ""
 "Please list all participants (also youth leaders) of this excursion. Here "
 "you can still make changes just before departure and hence generate the "
@@ -238,30 +238,30 @@ msgstr ""
 "jederzeit die aktuelle Teilnehmer:innenliste für die Krisenintervention "
 "generieren."
 
-#: members/admin.py:756
+#: members/admin.py:758
 #, python-format
 msgid "You are not allowed to view all members on note list %(name)s."
 msgstr ""
 "Du hast nicht die nötigen Rechte um alle Teilnehmer:innen der Notizliste "
 "%(name)s anzusehen."
 
-#: members/admin.py:766
+#: members/admin.py:768
 msgid "Generate PDF summary"
 msgstr "Übersicht erstellen"
 
-#: members/admin.py:770
+#: members/admin.py:772
 msgid "Full report"
 msgstr "Vollständiger Seminarbericht"
 
-#: members/admin.py:771
+#: members/admin.py:773
 msgid "Costs and participants only"
 msgstr "Nur Kosten und Teilnehmende"
 
-#: members/admin.py:772
+#: members/admin.py:774
 msgid "Mode"
 msgstr "Modus"
 
-#: members/admin.py:786
+#: members/admin.py:788
 msgid ""
 "General information on your excursion. These are partly relevant for the "
 "amount of financial compensation (means of transport, travel distance, etc.)."
@@ -270,38 +270,38 @@ msgstr ""
 "teilweise relevant für die Zuschüsse aus dem Jugendetat (Verkehrsmittel, "
 "Fahrstrecke in km)."
 
-#: members/admin.py:816
+#: members/admin.py:818
 #, python-format
 msgid "You are not allowed to view all members on excursion %(name)s."
 msgstr ""
 "Du hast nicht die nötigen Rechte um alle Teilnehmer:innen der Ausfahrt "
 "%(name)s anzusehen."
 
-#: members/admin.py:824
+#: members/admin.py:826
 msgid "Generate crisis intervention list"
 msgstr "Kriseninterventionsliste erstellen"
 
-#: members/admin.py:832
+#: members/admin.py:834
 msgid "Generate overview"
 msgstr "Hinweise für Jugendleiter erstellen"
 
-#: members/admin.py:836 members/admin.py:859
+#: members/admin.py:838 members/admin.py:861
 #: members/templates/admin/generate_seminar_report.html:21
 msgid "Generate seminar report"
 msgstr "Seminarbericht erstellen"
 
-#: members/admin.py:849
+#: members/admin.py:851
 msgid "Please select a mode."
 msgstr "Bitte wähle einen Modus aus."
 
-#: members/admin.py:853
+#: members/admin.py:855
 msgid ""
 "Full mode is only available, if the seminar report section is filled out."
 msgstr ""
 "Der vollständiger Modus ist nur verfügbar, wenn der Seminarbericht "
 "ausgefüllt ist. "
 
-#: members/admin.py:871
+#: members/admin.py:873
 msgid "Generate SJR application"
 msgstr "SJR Antrag erstellen"
 
@@ -374,6 +374,10 @@ msgstr "Bis Jahrgang"
 msgid "youth leaders"
 msgstr "Jugendleiter"
 
+#: members/models.py:76
+msgid "week day"
+msgstr "Wochentag"
+
 #: members/models.py:77 members/models.py:1217
 msgid "Starting time"
 msgstr "Zeitpunkt"
@@ -1022,7 +1026,7 @@ msgid "Save and confirm registration"
 msgstr "Speichern und Registrierung bestätigen"
 
 #: members/templates/members/echo.html:6 members/templates/members/echo.html:13
-#: members/templates/members/echo_failed.html:11
+#: members/templates/members/echo_failed.html:10
 #: members/templates/members/echo_password.html:6
 #: members/templates/members/echo_password.html:11
 #: members/templates/members/echo_success.html:10
@@ -1037,23 +1041,23 @@ msgstr ""
 "Vielen Dank, dass du dich rückmeldest. Hier siehst du deine aktuellen Daten. "
 "Falls sich etwas geändert hat, trage das bitte hier ein."
 
-#: members/templates/members/echo_failed.html:6
+#: members/templates/members/echo_failed.html:5
 msgid "Echo failed"
 msgstr "Rückmeldung fehlgeschlagen"
 
-#: members/templates/members/echo_failed.html:13
-#: members/templates/members/invited_registration_failed.html:13
+#: members/templates/members/echo_failed.html:12
+#: members/templates/members/invited_registration_failed.html:12
 msgid "Something went wrong. The key you supplied is"
 msgstr "Etwas ist schief gegangen. Der verwendete Code ist"
 
-#: members/templates/members/echo_failed.html:15
-#: members/templates/members/invited_registration_failed.html:15
-#: members/templates/members/register_failed.html:15
+#: members/templates/members/echo_failed.html:14
+#: members/templates/members/invited_registration_failed.html:14
+#: members/templates/members/register_failed.html:14
 msgid "If you think this is a mistake, please"
 msgstr "Wenn du denkst, dass das ein Fehler ist, "
 
 #: members/templates/members/echo_failed.html:15
-#: members/templates/members/invited_registration_failed.html:15
+#: members/templates/members/invited_registration_failed.html:14
 #: members/templates/members/register_failed.html:15
 msgid "contact us."
 msgstr "kontaktiere uns."
@@ -1091,14 +1095,14 @@ msgstr ""
 "Du hast zu oft ein falsches Passwort eingegeben. Bitte frage deinen "
 "Jugendleiter nach einem korrekten Passwort."
 
-#: members/templates/members/invited_registration_failed.html:6
-#: members/templates/members/register_failed.html:6
+#: members/templates/members/invited_registration_failed.html:5
+#: members/templates/members/register_failed.html:5
 msgid "Registration failed"
 msgstr "Registrierung fehlgeschlagen"
 
-#: members/templates/members/invited_registration_failed.html:11
+#: members/templates/members/invited_registration_failed.html:10
 #: members/templates/members/register.html:6
-#: members/templates/members/register_failed.html:11
+#: members/templates/members/register_failed.html:10
 #: members/templates/members/register_password.html:6
 #: members/templates/members/register_success.html:6
 #: members/templates/members/register_wrong_password.html:6
@@ -1183,7 +1187,7 @@ msgstr "Registrieren"
 msgid "Here you can register for group"
 msgstr "Hier kannst du dich registrieren für die Gruppe"
 
-#: members/templates/members/register_failed.html:13
+#: members/templates/members/register_failed.html:12
 msgid "Something went wrong while processing your registration."
 msgstr "Etwas ist schief gelaufen, bei der Verarbeitung deiner Registrierung."
 
diff --git a/jdav_web/members/migrations/0027_alter_group_weekday.py b/jdav_web/members/migrations/0027_alter_group_weekday.py
new file mode 100644
index 0000000..1713448
--- /dev/null
+++ b/jdav_web/members/migrations/0027_alter_group_weekday.py
@@ -0,0 +1,18 @@
+# Generated by Django 4.0.1 on 2024-11-27 22:16
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('members', '0026_alter_emergencycontact_email'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='group',
+            name='weekday',
+            field=models.IntegerField(blank=True, choices=[(0, 'Monday'), (1, 'Tuesday'), (2, 'Wednesday'), (3, 'Thursday'), (4, 'Friday'), (5, 'Saturday'), (6, 'Sunday')], null=True, verbose_name='week day'),
+        ),
+    ]
diff --git a/jdav_web/members/migrations/0028_group_contact_email.py b/jdav_web/members/migrations/0028_group_contact_email.py
new file mode 100644
index 0000000..3f8d948
--- /dev/null
+++ b/jdav_web/members/migrations/0028_group_contact_email.py
@@ -0,0 +1,20 @@
+# Generated by Django 4.0.1 on 2024-11-27 22:40
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('mailer', '0005_alter_emailaddress_name'),
+        ('members', '0027_alter_group_weekday'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='group',
+            name='contact_email',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, to='mailer.emailaddress', verbose_name='Contact email'),
+        ),
+    ]
diff --git a/jdav_web/members/models.py b/jdav_web/members/models.py
index 4775e38..ebe3f47 100644
--- a/jdav_web/members/models.py
+++ b/jdav_web/members/models.py
@@ -73,9 +73,14 @@ class Group(models.Model):
     year_to = models.IntegerField(verbose_name=_('highest year'), default=2011)
     leiters = models.ManyToManyField('members.Member', verbose_name=_('youth leaders'),
                                      related_name='leited_groups', blank=True)
-    weekday = models.IntegerField(choices=WEEKDAYS, null=True, blank=True)
+    weekday = models.IntegerField(verbose_name=_('week day'), choices=WEEKDAYS, null=True, blank=True)
     start_time = models.TimeField(verbose_name=_('Starting time'), null=True, blank=True)
     end_time = models.TimeField(verbose_name=_('Ending time'), null=True, blank=True)
+    contact_email = models.ForeignKey('mailer.EmailAddress',
+                                      verbose_name=_('Contact email'),
+                                      null=True,
+                                      blank=True,
+                                      on_delete=models.SET_NULL)
 
     def __str__(self):
         """String representation"""
@@ -85,6 +90,10 @@ class Group(models.Model):
         verbose_name = _('group')
         verbose_name_plural = _('groups')
 
+    def has_time_info(self):
+        # return if the group has all relevant time slot information filled
+        return self.weekday and self.start_time and self.end_time
+
 
 class MemberManager(models.Manager):
     def get_queryset(self):
@@ -154,9 +163,9 @@ class Contact(CommonModel):
                 return getattr(self, email_fd)
         return None
 
-    def send_mail(self, subject, content):
+    def send_mail(self, subject, content, cc=None):
         send_mail(subject, content, settings.DEFAULT_SENDING_MAIL,
-            [getattr(self, email_fd) for email_fd, _, _ in self.email_fields])
+            [getattr(self, email_fd) for email_fd, _, _ in self.email_fields], cc=cc)
 
 
 def confirm_mail_by_key(key):
@@ -849,21 +858,23 @@ class MemberWaitingList(Person):
             group_link = '({url}) '.format(url=prepend_base_url(reverse('startpage:gruppe_detail', args=[group.name])))
         else:
             group_link = ''
-        # TODO: inform the user that the group has no configured weekday, start_time or end_time
-        weekday = WEEKDAYS[group.weekday][1] if group.weekday != None else WEEKDAYS[0][1]
-        start_time = group.start_time.strftime('%H:%M') if group.start_time != None else "14:00"
-        end_time = group.end_time.strftime('%H:%M') if group.end_time != None else "16:00"
+        if group.has_time_info():
+            group_time = settings.GROUP_TIME_AVAILABLE_TEXT.format(weekday=WEEKDAYS[group.weekday][1],
+                                                          start_time=group.start_time.strftime('%H:%M'),
+                                                          end_time=group.end_time.strftime('%H:%M'))
+        else:
+            group_time = settings.GROUP_TIME_UNAVAILABLE_TEXT.format(contact_email=group.contact_email)
         invitation = InvitationToGroup(group=group, waiter=self)
         invitation.save()
         self.send_mail(_("Invitation to trial group meeting"),
             settings.INVITE_TEXT.format(name=self.prename,
-            weekday=weekday,
-            start_time=start_time,
-            end_time=end_time,
-            group_name=group.name,
-            group_link=group_link,
-            link=get_registration_link(invitation.key),
-            invitation_reject_link=get_invitation_reject_link(invitation.key)))
+                group_time=group_time,
+                group_name=group.name,
+                group_link=group_link,
+                contact_email=group.contact_email,
+                link=get_registration_link(invitation.key),
+                invitation_reject_link=get_invitation_reject_link(invitation.key)),
+            cc=group.contact_email.email)
 
     def unregister(self):
         """Delete the waiter and inform them about the deletion via email."""