I'm trying to figure out how to push back the start date of a project automatically 16 weeks based on the date of one task in the task list.
So, for example, if I assign a project and the start date is 2/19/2024, but then I go into the task list and change the Event Day task date to 6/11/2024, the start date would change to 2/20/2024?
you wouldn't be able to change the project start date based on a date within the project. The closest you would get would be to change the first task's dates, using predecessors. e.g. if the Event Day task is task #14, your first task's predecessor would be looking at "task 14 minus 16 weeks" (14-112c)
Please read up more on lags, especially the negative lags gotchas here: https://experienceleague.adobe.com/docs/workfront/using/manage-work/tasks/use-task-predecessors/lag-types.html?lang=en
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