diff --git a/src/model/trip.rs b/src/model/trip.rs
index b7d3d5e..b4c5437 100644
--- a/src/model/trip.rs
+++ b/src/model/trip.rs
@@ -3,10 +3,11 @@ use serde::Serialize;
 use sqlx::SqlitePool;
 
 use super::{
+    notification::Notification,
     planned_event::{PlannedEvent, Registration},
     tripdetails::TripDetails,
     triptype::TripType,
-    user::CoxUser,
+    user::{CoxUser, User},
 };
 
 #[derive(Serialize, Clone, Debug)]
@@ -43,6 +44,34 @@ impl Trip {
         )
         .execute(db)
         .await;
+
+        let same_starting_datetime = TripDetails::find_by_startingdatetime(
+            db,
+            trip_details.day,
+            trip_details.planned_starting_time,
+        )
+        .await;
+        if same_starting_datetime.len() > 1 {
+            for notify in same_starting_datetime {
+                if notify.id != trip_details.id {
+                    // notify everyone except oneself
+                    if let Some(trip) = Trip::find_by_trip_details(db, notify.id).await {
+                        let user = User::find_by_id(db, trip.cox_id as i32).await.unwrap();
+                        Notification::create(
+                            db,
+                            &user,
+                            &format!(
+                                "{} hat eine Ausfahrt zur selben Zeit ({} um {}) wie du erstellt",
+                                user.name, trip.day, trip.planned_starting_time
+                            ),
+                            "Neue Ausfahrt zur selben Zeit".into(),
+                            None,
+                        )
+                        .await;
+                    }
+                }
+            }
+        }
     }
 
     pub async fn find_by_trip_details(db: &SqlitePool, tripdetails_id: i64) -> Option<Self> {
diff --git a/src/model/tripdetails.rs b/src/model/tripdetails.rs
index aeec004..485e66f 100644
--- a/src/model/tripdetails.rs
+++ b/src/model/tripdetails.rs
@@ -46,6 +46,24 @@ WHERE id like ?
         .ok()
     }
 
+    pub async fn find_by_startingdatetime(
+        db: &SqlitePool,
+        day: String,
+        planned_starting_time: String,
+    ) -> Vec<Self> {
+        sqlx::query_as!(
+            Self,
+            "
+SELECT id, planned_starting_time, max_people, day, notes, allow_guests, trip_type_id, always_show, is_locked
+FROM trip_details 
+WHERE day = ? AND planned_starting_time = ?
+        "
+        , day, planned_starting_time
+        )
+        .fetch_all(db)
+        .await.unwrap()
+    }
+
     /// Creates a new entry in `trip_details` and returns its id.
     pub async fn create(db: &SqlitePool, tripdetails: TripDetailsToAdd<'_>) -> i64 {
         let query = sqlx::query!(