SSI checks for September 2023 were scheduled to be deposited on September 1, 2023, which was a Friday. Additionally, because October 1, 2023, falls on a Sunday, the SSI payment for October was deposited early on September 29, 2023, giving recipients two payments in September 2023. To summarize:

• September 2023 SSI payment was deposited on September 1, 2023.
• October 2023 SSI payment was deposited early on September 29, 2023.

This schedule aligns with the Social Security Administration practice of issuing SSI payments on the 1st of the month, and when the 1st falls on a weekend, payments are issued the preceding Friday.