What does the notation T - 1 indicate?

The notation T - 1 is commonly used in scheduling and project management contexts to represent "one day before today." In this framework, "T" specifically denotes the current date, and when we subtract one day from that, it yields yesterday's date. This understanding is crucial when planning schedules, objectives, or tasks that depend on timely references.

In contrast, the other options misinterpret the significance of the notation: "one week ago" would imply a larger time frame that incorporates seven days, while "the current date" and "one month ago" do not align with the subtractive notation of one day indicated by T - 1. Thus, T - 1 accurately denotes the day prior to the current date, which corresponds to yesterday's date.