diff --git a/archival.rb b/archival.rb
index b3fd137..fb18815 100755
--- a/archival.rb
+++ b/archival.rb
@@ -300,6 +300,7 @@ def main
 		stations: failed_stations,
 		trains: failed_trains,
 	}))
+    File.write('./last_executed_run.txt', $datestr)
 end
 
 if __FILE__ == $0