An agile product is developed and delivered often and regularly with help of sprints, or releases (3-4 sprints) time boxes. That does not mean that due dates are not necessary anymore. The business is business, your clients do not care about agile terminology.
The Roadmap Events
The timeline, displayed on the top of the roadmap editor, is capable to track important events:
the green flag indicates an end of sprints,
the orange flag indicates an end of releases,
the red flag indicates an actual day.
To find the name of the iteration just move a mouse over it or click the flag to access release or sprint details.