I've no idea how Traveller works. The system use a 2d6+Value. Most time that you roll that to make a Test, the Test has a Difficulty that must be equaled or beaten. The result of the Test is then converted into a number of additional successes. Skills are divided into two values, Focus and Class. Focus is the general skill level of the Skill and Class is how good the character is at the Skill or Attribute relative to others. As an example, let's say you have something you pride yourself of. You also know that you've no ability compared to those people who get medals and accolades for doing it. In that case, you'd be Class 0 and the other person Class 2. The main difference from other systems is that each point of Focus and Class gives a Success. This is important in relation to Difficulties. If the Successes from Focus and Class are already enough to equal or higher it, then there's no Test, it just succeeds, move on. It's still possible to make a Test, in that case, to show off, however, that runs the risk of messing up. As for time and day, nothing has been decided yet. I can rule out Mon, Wed, and Sun for days as I've other things there and as for the time I imagine something around 17.00 so people has a chance to get home and do their own thing for a little while before gaming.