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!
Sen's Gate Skip
The Sen's Gate Skip is a sequence break in Dark Souls that allows the player to skip the main gate of Sen's Fortress (and in this way also ringing the two Bells of Awakening to open it) by getting Deathcam in Undead Parish.
The skip was theorized to be possible by the community in the past, and was finally made possible by CapitaineToinon in December 2016.