diff --git a/cfg/config_template.json b/cfg/config_template.json
index a575217..838bdc2 100644
--- a/cfg/config_template.json
+++ b/cfg/config_template.json
@@ -4,6 +4,7 @@
     "telegram_bot_token": "",
     "telegram_channels": [{"name": "ThekendienstBotTest", "id": -4558981107}],
     "subcalendars_to_check": ["flexibler Thekendienst", "regelmäßiger Thekendienst"],
+    "default_subcalendar_for_new_event": ["flexibler Thekendienst"],
     "timezone": "Europe/Berlin",
     "header": "Es gibt noch offene Thekendienste für diese Woche\\!\nWer kann bitte im [Kalender](https://teamup.com/ksp4hsa93c1nt5kmym) eintragen und im 'HOBBYHIMMEL Thekenhelden' chat melden\\.\n\n",
     "footer": "\\- Der freundliche Theckendiensterinnerungsbot",
diff --git a/src/reportMissingThekendienst.py b/src/reportMissingThekendienst.py
index 1bf1924..07f971f 100644
--- a/src/reportMissingThekendienst.py
+++ b/src/reportMissingThekendienst.py
@@ -6,6 +6,7 @@ import sys
 from datetime import datetime, timedelta, time
 from zoneinfo import ZoneInfo
 from typing import NamedTuple
+from collections import defaultdict
 import locale
 import urllib
 import telegram
@@ -186,16 +187,22 @@ def convert_to_date(zone, text, days_to_check=None) -> datetime:
 def parse_time(text: str) -> time:
     return time.fromisoformat(text)
 
+def fetch_sub_calander_ids_for_new_event(config, sub_calendars: List[Subcalendar]):
+    print(sub_calendars)
+    return [entry.id for entry in sub_calendars if entry.name in config['default_subcalendar_for_new_event']]
 
-def create_teamup_event_link(config, start: datetime, end: datetime) -> str:
+
+def create_teamup_event_link(config, sub_calendars, start: datetime, end: datetime) -> str:
     format_string = "%Y-%m-%d %H:%M:%S"
     url_start = urllib.parse.quote(start.strftime(format_string))
     url_end = urllib.parse.quote(end.strftime(format_string))
-    return f"https://teamup.com/{config['calendar_id']}/events/new?start_dt={url_start}&end_dt={url_end}"
+    sub_calendars_id = fetch_sub_calander_ids_for_new_event(config, sub_calendars)
+    sub_calendars_string = f"&subcalendar_ids=[{','.join([str(sub_calendar_id) for sub_calendar_id in sub_calendars_id])}]"
+    return f"https://teamup.com/{config['calendar_id']}/events/new?start_dt={url_start}&end_dt={url_end}{sub_calendars_string}"
 
 
-def check_slots(events, start_date, end_date):
-    message = ""
+def find_open_slots(config, events, start_date, end_date)-> List[TimeSlot]:
+    open_slots = []
     for i in range((end_date - start_date).days + 1):
         check_date = start_date + timedelta(days=i)
         day_of_week = check_date.strftime("%A")  # Get the day name, e.g., 'Monday'
@@ -208,27 +215,46 @@ def check_slots(events, start_date, end_date):
                 events, check_date, start_time, end_time
             )
 
-            # kind of a hack but I don't want to install any packages
-            old_locale = locale.getlocale()
-            locale.setlocale(locale.LC_ALL, "de_DE.utf8")
+            open_slots += free_time_slots
 
-            if free_time_slots:
-                free_slots = "\n                             ".join(
-                    [
-                        f"`{slot.start:%H:%M} \\- {slot.end:%H:%M}` \\- [{config["appointment_motivator"]}]({create_teamup_event_link(config, slot.start, slot.end)}) 💪"
-                        for slot in free_time_slots
-                    ]
-                )
-                message += f"🚨 `{free_time_slots[0].start:%a}, {free_time_slots[0].start:%d\\.%m\\.} `{free_slots}\n"
-            locale.setlocale(locale.LC_ALL, old_locale)
+
+    return open_slots
+
+def group_by_dow(open_slots: List[TimeSlot]) -> dict[str, list[str]]:
+    res = defaultdict(list)
+    for v in open_slots: res[v.start.strftime("%a")].append(v)
+    return res
+
+def make_slots_message(config, sub_calendars, open_slots: List[TimeSlot])-> str:
+    # kind of a hack but I don't want to install any packages
+    old_locale = locale.getlocale()
+    locale.setlocale(locale.LC_ALL, "de_DE.utf8")
+    message = ""
+
+    if open_slots:
+        slots_by_dow = group_by_dow(open_slots)
+        for dow, slots in slots_by_dow.items():
+            free_slots = "\n                             ".join(
+                [
+                    f"`{slot.start:%H:%M} \\- {slot.end:%H:%M}` \\- [{config["appointment_motivator"]}]({create_teamup_event_link(config, sub_calendars, slot.start, slot.end)}) 💪"
+                    for slot in slots
+                ]
+            )
+            message += f"🚨 `{dow}, {slots[0].start:%d\\.%m\\.} `{free_slots}\n"
+    locale.setlocale(locale.LC_ALL, old_locale)
 
     return message
 
-def finalize_message(config, message):
+
+def finalize_message(config, sub_calendars, open_slots: List[TimeSlot])-> str:
+    message = make_slots_message(config, sub_calendars, open_slots)
+
     if message:
-        message = config["header"] + message + "\n" + config["footer"]
+        message = config["header"] + message
     else:
         message = config["no_open_slots"]
+
+    message += "\n" + config["footer"]
     return message
 
 async def check_slots_and_notify(config: map, dry_run: bool = False) -> None:
@@ -259,9 +285,9 @@ async def check_slots_and_notify(config: map, dry_run: bool = False) -> None:
         f"Found {len(events)} events in the time range for calendars '{"', '".join(sub_calendar.name for sub_calendar in sub_calendars)}'."
     )
 
-    message = check_slots(events, start_date, end_date)
+    open_slots = find_open_slots(config, events, start_date, end_date)
 
-    message = finalize_message(config, message)
+    message = finalize_message(config, sub_calendars, open_slots)
 
     if dry_run:
         print("Messsage that would be sent on Telegram:")