The month of stock index futures contract refers to the month when the stock index futures contract is due for delivery. Different countries and regions set different futures contract months. In overseas futures markets, there are two main ways to set the month of stock index futures contracts: one is the quarterly month model, the other is the latest month, plus the forward quarterly month. For example, the contract months of Hang Seng Index Futures in Hongkong and Taiwan Province Index Futures in Taiwan Province Province are two recent months and two quarterly months.