Calendar dependencies and/or formulas

I’m trying to create a production timeline that can be used every year. Our production events are very consistent from year to year and I want to create a table that automatically updates task dates when the due date changes. I think I’m close using the DATEADD but I just can’t get it to work. Any help would be greatly appreciated.

Hi @Matthew_Armstrong - can you share an example of what you have go so far? Screenshots and/or formulas? Would be helpful to get a bit context on the problem.