diff --git a/syntax/todo.vim b/syntax/todo.vim
index eabcd9f..eed08c8 100644
--- a/syntax/todo.vim
+++ b/syntax/todo.vim
@@ -9,33 +9,34 @@ if exists("b:current_syntax")
     finish
 endif
 
-syntax  match  TodoDone       '^[xX]\s.\+$'               contains=TodoDate,TodoProject,TodoContext
-syntax  match  TodoPriorityA  '^([aA])\s.\+$'             contains=TodoDate,TodoProject,TodoContext
-syntax  match  TodoPriorityB  '^([bB])\s.\+$'             contains=TodoDate,TodoProject,TodoContext
-syntax  match  TodoPriorityC  '^([cC])\s.\+$'             contains=TodoDate,TodoProject,TodoContext
-syntax  match  TodoPriorityD  '^([dD])\s.\+$'             contains=TodoDate,TodoProject,TodoContext
-syntax  match  TodoPriorityE  '^([eE])\s.\+$'             contains=TodoDate,TodoProject,TodoContext
-syntax  match  TodoPriorityF  '^([fF])\s.\+$'             contains=TodoDate,TodoProject,TodoContext
-syntax  match  TodoPriorityG  '^([gG])\s.\+$'             contains=TodoDate,TodoProject,TodoContext
-syntax  match  TodoPriorityH  '^([hH])\s.\+$'             contains=TodoDate,TodoProject,TodoContext
-syntax  match  TodoPriorityI  '^([iI])\s.\+$'             contains=TodoDate,TodoProject,TodoContext
-syntax  match  TodoPriorityJ  '^([jJ])\s.\+$'             contains=TodoDate,TodoProject,TodoContext
-syntax  match  TodoPriorityK  '^([kK])\s.\+$'             contains=TodoDate,TodoProject,TodoContext
-syntax  match  TodoPriorityL  '^([lL])\s.\+$'             contains=TodoDate,TodoProject,TodoContext
-syntax  match  TodoPriorityM  '^([mM])\s.\+$'             contains=TodoDate,TodoProject,TodoContext
-syntax  match  TodoPriorityN  '^([nN])\s.\+$'             contains=TodoDate,TodoProject,TodoContext
-syntax  match  TodoPriorityO  '^([oO])\s.\+$'             contains=TodoDate,TodoProject,TodoContext
-syntax  match  TodoPriorityP  '^([pP])\s.\+$'             contains=TodoDate,TodoProject,TodoContext
-syntax  match  TodoPriorityQ  '^([qQ])\s.\+$'             contains=TodoDate,TodoProject,TodoContext
-syntax  match  TodoPriorityR  '^([rR])\s.\+$'             contains=TodoDate,TodoProject,TodoContext
-syntax  match  TodoPriorityS  '^([sS])\s.\+$'             contains=TodoDate,TodoProject,TodoContext
-syntax  match  TodoPriorityT  '^([tT])\s.\+$'             contains=TodoDate,TodoProject,TodoContext
-syntax  match  TodoPriorityU  '^([uU])\s.\+$'             contains=TodoDate,TodoProject,TodoContext
-syntax  match  TodoPriorityV  '^([vV])\s.\+$'             contains=TodoDate,TodoProject,TodoContext
-syntax  match  TodoPriorityW  '^([wW])\s.\+$'             contains=TodoDate,TodoProject,TodoContext
-syntax  match  TodoPriorityX  '^([xX])\s.\+$'             contains=TodoDate,TodoProject,TodoContext
-syntax  match  TodoPriorityY  '^([yY])\s.\+$'             contains=TodoDate,TodoProject,TodoContext
-syntax  match  TodoPriorityZ  '^([zZ])\s.\+$'             contains=TodoDate,TodoProject,TodoContext
+syntax  match  TodoDone       '^[xX]\s.\+$'               contains=TodoDate,TodoProject,TodoContext,OverDueDate
+syntax  match  TodoPriorityA  '^([aA])\s.\+$'             contains=TodoDate,TodoProject,TodoContext,OverDueDate
+syntax  match  TodoPriorityB  '^([bB])\s.\+$'             contains=TodoDate,TodoProject,TodoContext,OverDueDate
+syntax  match  TodoPriorityC  '^([cC])\s.\+$'             contains=TodoDate,TodoProject,TodoContext,OverDueDate
+syntax  match  TodoPriorityD  '^([dD])\s.\+$'             contains=TodoDate,TodoProject,TodoContext,OverDueDate
+syntax  match  TodoPriorityE  '^([eE])\s.\+$'             contains=TodoDate,TodoProject,TodoContext,OverDueDate
+syntax  match  TodoPriorityF  '^([fF])\s.\+$'             contains=TodoDate,TodoProject,TodoContext,OverDueDate
+syntax  match  TodoPriorityG  '^([gG])\s.\+$'             contains=TodoDate,TodoProject,TodoContext,OverDueDate
+syntax  match  TodoPriorityH  '^([hH])\s.\+$'             contains=TodoDate,TodoProject,TodoContext,OverDueDate
+syntax  match  TodoPriorityI  '^([iI])\s.\+$'             contains=TodoDate,TodoProject,TodoContext,OverDueDate
+syntax  match  TodoPriorityJ  '^([jJ])\s.\+$'             contains=TodoDate,TodoProject,TodoContext,OverDueDate
+syntax  match  TodoPriorityK  '^([kK])\s.\+$'             contains=TodoDate,TodoProject,TodoContext,OverDueDate
+syntax  match  TodoPriorityL  '^([lL])\s.\+$'             contains=TodoDate,TodoProject,TodoContext,OverDueDate
+syntax  match  TodoPriorityM  '^([mM])\s.\+$'             contains=TodoDate,TodoProject,TodoContext,OverDueDate
+syntax  match  TodoPriorityN  '^([nN])\s.\+$'             contains=TodoDate,TodoProject,TodoContext,OverDueDate
+syntax  match  TodoPriorityO  '^([oO])\s.\+$'             contains=TodoDate,TodoProject,TodoContext,OverDueDate
+syntax  match  TodoPriorityP  '^([pP])\s.\+$'             contains=TodoDate,TodoProject,TodoContext,OverDueDate
+syntax  match  TodoPriorityQ  '^([qQ])\s.\+$'             contains=TodoDate,TodoProject,TodoContext,OverDueDate
+syntax  match  TodoPriorityR  '^([rR])\s.\+$'             contains=TodoDate,TodoProject,TodoContext,OverDueDate
+syntax  match  TodoPriorityS  '^([sS])\s.\+$'             contains=TodoDate,TodoProject,TodoContext,OverDueDate
+syntax  match  TodoPriorityT  '^([tT])\s.\+$'             contains=TodoDate,TodoProject,TodoContext,OverDueDate
+syntax  match  TodoPriorityU  '^([uU])\s.\+$'             contains=TodoDate,TodoProject,TodoContext,OverDueDate
+syntax  match  TodoPriorityV  '^([vV])\s.\+$'             contains=TodoDate,TodoProject,TodoContext,OverDueDate
+syntax  match  TodoPriorityW  '^([wW])\s.\+$'             contains=TodoDate,TodoProject,TodoContext,OverDueDate
+syntax  match  TodoPriorityX  '^([xX])\s.\+$'             contains=TodoDate,TodoProject,TodoContext,OverDueDate
+syntax  match  TodoPriorityY  '^([yY])\s.\+$'             contains=TodoDate,TodoProject,TodoContext,OverDueDate
+let due_date = "/^([zZ])\s.\+$/"
+execute "syntax  match  TodoPriorityZ  " due_date "             contains=TodoDate,TodoProject,TodoContext"
 syntax  match  TodoDate       '\d\{2,4\}-\d\{2\}-\d\{2\}' contains=NONE
 syntax  match  TodoProject    '\(^\|\W\)+[^[:blank:]]\+'  contains=NONE
 syntax  match  TodoContext    '\(^\|\W\)@[^[:blank:]]\+'  contains=NONE
@@ -49,4 +50,11 @@ highlight  default  link  TodoDate       PreProc
 highlight  default  link  TodoProject    Special
 highlight  default  link  TodoContext    Special
 
+if has('python')
+    let b:curdir = expand('<sfile>:p:h')
+    execute "pyfile " . b:curdir . "/../python/todo.py"
+else
+    echom "Your version of vim has no python support. Overdue dates won't be highlighted"
+endif
+
 let b:current_syntax = "todo"