Lately I'm thinkin 60 days. That's plenty long enough and it's easy to remember (2 months, 8 weeks). At least for starters. So far all the games being played were started under no time limits, so I dunno if they should get a special amnesty or if they should just lose. I'm thinking they should just lose. That's whatcha get. You had two months!
How can you argue with that?