DirecTV HD Receiver User Manual page 49

-Captioning
On High-Definition receivers, select "Captioning" to turn closed
captioning on or off, and to select the font style, size and color for the
display of captions.
-Clock
Select "Clock" (or "Time Zone" on Standard-Definition Receivers) to
set your time zone and whether you want the receiver to show Daylight
Savings time or not.
High
-Definition Receivers
Parental, Fav's & Setup - System Setup
Chapter 2 -
Detailed Information
49