Buying an open-end fund is really a T+ 1 transaction, which is called a working day. The specific day depends on the trading T-day. Judge T-day, and you will know what day T+ 1 is.

The trading day is a rest day, definitely not T day, and the next working day is T day.

The day of the transaction is a working day, not necessarily a T day. Only transactions before 15 are T-day. For transactions after 15, the next working day is t day.

The so-called working day, as long as you look at the opening of the stock market that day, it is not a working day if the stock market does not open.