This question has been settled with a final result: "0 (no change)". Trading has finished.
On September 20 at 2 pm the statement is released.
Website: FOMC Meeting Website
Information/Background: https://www.investopedia.com/terms/f/federalfundsrate.asp
Note: If there is no published results (within two days of the usual annoucmement) or there is some sort of disruption then it will be counted as 0 or no change in the interest rate.
Hat tip: Jacob for suggesting the market