Buy before T-day 15: 00, which is the net value after T-day closing. After t day 15: 00, it is the net value after T+ 1 night closing.

Suppose t and T+ 1 are trading days, if they are not postponed to the next trading day.

If you buy before Friday 15: 00, it is the net value on Friday night, and after 15: 00, it is the net value on Monday night.

All open-end funds are like this.