diff --git a/generate_calendar_dates.php b/generate_calendar_dates.php
index 0d3bcfd..1a807d9 100644
--- a/generate_calendar_dates.php
+++ b/generate_calendar_dates.php
@@ -10,7 +10,7 @@
 /*
 	Date of the Monday of the first academic week of the year. Teaching weeks start on Monday, so this is a convenient base point to start from. This will need to be updated annually.
 */
-$first_monday = new DateTime( "2012-01-02" );
+$first_monday = new DateTime( "2012-12-31" );
 
 
 /*