Variable substitution for "Planned date of delivery"

Hi,
I’m using version Dolibarr 12 (and I love it :wink: ).

I like the “Variable Substitution System”, but I wasn’t able to find a variable for the “Planned date of delivery” in sales orders.
I think the delivery date is a commonly needed field (especially in combination with the customer reference, which IS available.).

Is there a simple way to get the delivery date as variable?

I found this thread, but it’s 3 years old, and if possible, I’d like to use avoid “hacking” files.

Thanks a lot in advance!