GT5 Maintenance Notice

The online service of Gran Turismo 5 will undergo maintenance during the following hours:
(1)
Start 08/23/2011 10:00 EST
Finish 08/23/2011 16:00 EST
(2)
Start 08/29/2011 22:00 EST
Finish 08/29/2011 23:00 EST
(3)
Start 09/06/2011 10:00 EST
Finish 09/06/2011 18:00 EST
(4)
Start 09/13/2011 10:00 EST
Finish 09/13/2011 18:00 EST

During the maintenance, you will not be able to connect to any of the online services.  
*Please note that the exact time of the maintenance may slightly vary.
From:  http://us.gran-turismo.com/us/news/d5893.html