diff --git a/home/models.py b/home/models.py
index 52a018a74..b453c1c09 100644
--- a/home/models.py
+++ b/home/models.py
@@ -2444,7 +2444,7 @@ def objects_for_dashboard(cls, user):
 # --------------------------------------------------------------------------- #
 
 def create_time_commitment_calendar(tcs, application_round):
-    application_period_length = (application_round.internends - application_round.internstarts).days + 1
+    application_period_length = (application_round.internends - application_round.internstarts).days
     calendar = [0]*(application_period_length)
     for tc in tcs:
         date = application_round.internstarts