Q - Is it possible to amend the labels along the axis of the timeline to reflect the actual year rather than the age of the client?
A - You can do this onscreen, in the software, but not in the reports. Simply go to the Time screen and under Owner, top left, deselect the green dot that should appear, by default, next to the owner of the plan.
With no owner selected, two digit years will appear along the axis of the timeline.
There is not a way to change what is shown along the axis of the Let's see charts but click on any bar and the year is shown on the legend.