How does the Timeframe field work?

How does the timeframe field work?

Within the lowest three tiers of your project plans (Milestones, Tasks and Subtasks) you have an available Timeframe field within the Detail Screen (accessible from the Activity Map or Hierarchy Tab on the Tab Bar):

The timeframe field is an automated calculation of the difference between the Program Start Date (located in the Summary tab) and the Forecast End Date within an item.  For example, if the Program Start Date equals April 1, 2022, and the Forecast End Date of a Task equals June 30, 2022, the Timeframe field will display “Day 90.”

The list of possible outcomes can be found in the chart below: