diff --git a/src/model/event.rs b/src/model/event.rs
index 90eb9c0..6258efb 100644
--- a/src/model/event.rs
+++ b/src/model/event.rs
@@ -457,10 +457,16 @@ WHERE trip_details.id=?
             format!("event-{}@rudernlinz.at", self.id),
             "19900101T180000",
         );
+        let time_str = self.planned_starting_time.replace(':', "");
+        let formatted_time = if time_str.len() == 3 {
+            format!("0{}", time_str)
+        } else {
+            time_str.clone() // TODO: remove again
+        };
         vevent.push(DtStart::new(format!(
             "{}T{}00",
             self.day.replace('-', ""),
-            self.planned_starting_time.replace(':', "")
+            formatted_time
         )));
 
         let original_time = NaiveTime::parse_from_str(&self.planned_starting_time, "%H:%M")
diff --git a/src/model/trip.rs b/src/model/trip.rs
index 9b14133..98dd878 100644
--- a/src/model/trip.rs
+++ b/src/model/trip.rs
@@ -148,10 +148,17 @@ WHERE trip_details.id=?
     pub(crate) async fn get_vevent(self, user: &User) -> ics::Event {
         let mut vevent =
             ics::Event::new(format!("trip-{}@rudernlinz.at", self.id), "19900101T180000");
+        let time_str = self.planned_starting_time.replace(':', "");
+        let formatted_time = if time_str.len() == 3 {
+            format!("0{}", time_str)
+        } else {
+            time_str
+        };
+
         vevent.push(DtStart::new(format!(
             "{}T{}00",
             self.day.replace('-', ""),
-            self.planned_starting_time.replace(':', "")
+            formatted_time
         )));
 
         let original_time = NaiveTime::parse_from_str(&self.planned_starting_time, "%H:%M")