diff --git a/src/rest/cal.rs b/src/rest/cal.rs
index 5f5c6fc..21b3026 100644
--- a/src/rest/cal.rs
+++ b/src/rest/cal.rs
@@ -17,7 +17,8 @@ PRODID:-//rudernlinz.at//Trips//DE"#,
         res.push_str(&format!("\nUID:{}@rudernlinz.at", event.id));
         res.push_str(&format!(
             "\nDTSTART:{}T{}Z",
-            event.day, event.planned_starting_time
+            event.day.replace("-", ""),
+            event.planned_starting_time
         ));
         res.push_str(&format!("\nSUMMARY:{}", event.name));