The delivery date of the stock index futures contract in the current month is the third Friday of the current month, and it will be postponed to the next trading day under special circumstances; Retail investors need not care about delivery. As long as you make the contract with the largest volume, the futures contract will go straight ahead. For example, the stock index is now an IF 1409 contract. A few days before the third Friday of this month, many funds began to transfer to the IF 14 10 contract, which can be clearly seen from the transaction volume; T+0 is a business, of course.