Would be great if you can point to / send this script to me. We are looking to solve a similar issue at one of our customers.
There is a script available through Anaplan Connect that will allow the import of today's date into the model. This is the only way that the date can be updated throughout the model. There are no formulas that will enable that function to automatically happen.
If you are interested in that script, please let me know and I can get that to you.