First, here is some context: On Friday, December 19th, starting at 6:00 PM Eastern Standard Time (USA) the Dice Tower is beginning a live 18-24 hour gaming marathon.
Similar to last year, the marathon will be broken into 4 separate 6 (or fewer) hour segments. I think the separation is due to Youtube limitations on live broadcasts. Each segment has games that are "On the Schedule" as well as games that are "possible to be played." You can view the "scheduled" games and the "possible" games by viewing the Youtube descriptions for each of the segments linked below:
Dice Tower Live: 24 Hours of Gaming! Part 1/4
Dice Tower Live: 24 Hours of Gaming! Part 2/4
Dice Tower Live: 24 Hours of Gaming! Part 3/4
Dice Tower Live: 24 Hours of Gaming! Part 4/4
Now for the important part: Cosmic Encounter is "on the schedule" to be played sometime during part 3 of 4 that will begin sometime around 6:00 AM Eastern Standard Time on Saturday December 20th, 2014 (or 3:00 AM PST if you are on the Pacific Coast, like me).
Lastly, if you won't be available to see it live, it should be available to view on the Dice Tower channel after-the-fact.