Senate Passes Stopgap Spending Bill, Averting Government Shutdown

The Senate passed a bill 84 to 10 to prevent a partial government shutdown, keeping the government funded through December 11th. The House had already passed the bill, and President Trump needs to sign it before midnight to avoid a shutdown before Election Day. The stopgap bill supports various programs, including Federal Flood Insurance and Medicaid provisions. Lawmakers must agree on future spending legislation to keep the government running through September 2021.

What is the significance of September 30th in the context of the text?

What do lawmakers need to agree on to keep the government running through September 2021?