Curator: create indicies in advance

Is there any way to do date math in Curator? I have daily indicies. I know about templates, but there are certain things you can't do with templates.

Specifically, I want to create: index-%Y-%m-${tomorrow} with alias-v3-%Y-%m-${tomorrow}.

I tried %{d+1} but that did not work.

Out of curiosity, what would you like to do with that templates can't do?

I want to have an alias with the same date as the index. You can use dates
and date math in the index name, but does that work for aliases too?

It's already got a feature request issue

It will be added at some point.