Personas 2.0 current date + xx days

Hello experts,

I have a "valid from" and a "valid to" field in one of my transactions. Using Personas, I was able to successfully set the current date on the valid from field (set current date MM/dd/yyyy for US format).

Now on the valid to field, I'm trying to get personas to automatically calculate current date + 90 days. For example, valid from = 11/20/2015. Valid to should be 02/13/2016 (current date + 90 days). I tried a few times using the examples from this link, but no luck.

http://stackoverflow.com/questions/3818193/how-to-add-number-of-days-to-todays-date

I also tried searching the scn forums but could not find anything.

Any suggestions?

Thanks,

Srini