The time period indicators in a Timeline can be set to Weeks, Months, Quarters, Halves, or Years. If a roadmap has a Fiscal year-end, you can set up a Timeline's Date Preferences so the labels for the indicators refer to the Fiscal year instead of the Calendar year.
If you select the Fiscal year, the items on the Timeline show their Calendar year dates but are plotted on the timeline in relation to the Fiscal year.
When you use Fiscal year labels, you can also choose the format of the labels (for example, FY2018, FY18, etc.).
To see how to set time period indicators to the Fiscal year, go to Customize the time pivot on a Timeline.
For help on setting a roadmap's year-end, go to Create a new roadmap from scratch.