diff --git a/900s Calendars/Teaching/2025-02-21 QSG SOTA PREP.md b/900s Calendars/Teaching/2025-02-21 QSG SOTA PREP.md
index aeb4f3b85..4e770176b 100644
--- a/900s Calendars/Teaching/2025-02-21 QSG SOTA PREP.md	
+++ b/900s Calendars/Teaching/2025-02-21 QSG SOTA PREP.md	
@@ -2,7 +2,7 @@
 title: QSG SOTA PREP
 allDay: false
 startTime: 08:30
-endTime: 10:00
+endTime: 09:00
 date: 2025-02-21
 completed: null
 ---