[Lizard]

coconino: Reschedule is for when you've made your plan, and worked on it for a few weeks, then realize some tasks are behind schedule. It slides them forward so that their incomplete portions start on or after the current date.

p_davis: I think you really want the start date in the project information inspector. You can set a specific date, or use an "Unspecified Start Date", so times will be labeled "T + 1 day", "T + 2 months", etc.