With the current Minimum Activity Requirements for Area 51 a new proposal has 3 days to get 5 followers and 5 example questions. The proposer can ask the 5 questions, so that is not much of a hurdle.
Unless the proposer already has a community that wants to come to Stack Exchange, the other 4 followers need to come from people browsing Area51. Presumably traffic is different depending on day of the week (i.e. weekends). A proposal at noon on Friday and a proposal at noon on Monday could be proposed, closed and deleted with some audiences never being aware of both.
What days of the week result in the most proposals passing and failing the Minimum Activity Requirements?