The Demon's Souls servers are officially shut down as of February 2018. For a temporary workaround to access accurate IGTIn-Game Time, please see this Reddit thread!
A glitch is unintended behavior in a video game that can sometimes be exploited to the advantage of the player. Examples include the creating copies of items in the players possession, or manipulating warp triggers to put the player further ahead in the game.
Video game glitches at Wikipedia