The 2019 X.Org Developer's Conference will take place October 2-4 in Montreal, Canada at Concordia University. It is important to note that registration might close earlier than the dates indicated if the maximum capacity is reached. In the past few years, this has happened a few weeks before the start of the conference. Early registration is therefore recommended. Registration will not be available onsite on the days of the conference, hence the last day to register, unless registration is closed earlier, will be September 30, 2019, two days prior to the conference.
Note: XDC shares the same Indico infrastructure as LPC. Therefore, if you previously registered on the LPC website (linuxplumbersconference.org), you already have an active account and can use the same username & password to login.