If you are talking about a sleep timer that will turn off the TV, no the X1 remotes do not have that ability. You would need to use the TVs remote to do that.
Can the sleep timer be set on the XR2 remote?
Hi Ladyt52, the information that (RickGr4) shared is correct. The sleep timer is a function of your TV set which you would have to use your TV remote or manual TV options to set the timer.