Generally, I would assume that September means "before the end of September." They have often added markets near the end of the calendar month for which they were announced.
They have moved some of the LIL dates back a month, so yours not having been moved is a sign they think it will happen. My market, Greenville-New Bern-Washington NC, was moved from October to November.
They have moved some of the LIL dates back a month, so yours not having been moved is a sign they think it will happen. My market, Greenville-New Bern-Washington NC, was moved from October to November.