diff --git a/_config.yml b/_config.yml
index 8d9e3f8..583193a 100644
--- a/_config.yml
+++ b/_config.yml
@@ -11,7 +11,7 @@ author:
 description: > # this means to ignore newlines until "show_excerpts:"
   While the @NASA Space Shuttle fleet was flying, @NASA published the mission schedule in @Microsoft Excel format for each flight 
   with frequent revisions. This Windows application would read the downloaded Excel files and create scheduling events in the 
-  Calendar section of @Microsoft Outlook. Support ended with wheelstop of STS-135 on July 11, 2011.
+  Calendar section of @Microsoft Outlook. Support ended with wheelstop of STS-135 on July 21, 2011.
 show_excerpts: false # set to true to show excerpts on the homepage
 
 # Minima date format