diff --git a/data/cosin.toml b/data/cosin.toml
index c562227..5d56028 100644
--- a/data/cosin.toml
+++ b/data/cosin.toml
@@ -8,7 +8,7 @@ is_cancelled = false
 # Set to false if date for next year is not known yet:
 date_known = true
 
-date_start_weekday = "Freitag"
+date_start_weekday = "Donnerstag"
 date_start_day = 29
 date_start_month = "Mai"