While using the activity, deployment and sequence diagrams for a long time, I recently discovered Gantt diagrams as well. This is very good, but for project proposals we do not know when the project is to start, so referring milestones and activities to a T0 would be beneficial. I have been searching for information on this, but is unable to find it.
Typically we would need to start an activity with a milestone (e.g. a Kick off). Using dates this is straight forward, but is it possible to do this with a generic timeline starting at T0?