Automatic countdown from the end of the task

Hello everyone!
I would like to know how to solve the problem with counting time from start date.
I create a template and together with it the date of the event, e.g. 07/29/2022 - let’s also assume that this is the date X.
From the start date of the event, I would need to create a formula counting down e.g. a week or two weeks before the start of the event to individual subtasks needed to complete the event.
There are two solutions - every time I create an event and assign dates rigidly - it is a pain for me :frowning:
And apparently the second - where x is subtracted from x - a week, x - a second week, and so on.
How to create something like this? Is there perhaps another nicer way to do this?
I’m on a premium plan.

Hi,

I am not entirely sure I understood but you can look at project templates and date shifting, using the project end date as a reference.

That’s the doc but it shows template v2, not v2. How to Use Asana Custom Templates • Asana Product Guide

That’s exactly what I meant.
Thank you very much for your help!