Q: reglage date et heure bloque

Hello, David/ 

Thanks for using Apple Support Communities.

I believe you are unable to activate your Apple TV as it is stuck on setting the date and time.  If this is the case, TCP port 123 is used to communicate with a network time server.  If your router is blocking this port it will never set the time.

For more information on this, take a look at this article:

Apple TV: TCP and UDP ports and protocols used

http://support.apple.com/kb/ht2463

Also it needs an active internet connection.

Apple TV (2nd and 3rd generation): Troubleshooting Wi-Fi networks and connections

http://support.apple.com/kb/TS4546

Also, you can hit the menu button on your remote which will bring you to the main Apple TV menu.

Cheers,

Jason H.