Target 90 days or more from today's date - smart list

[Anonymous]

I'm trying to create a smart list to target students with a class end date of '90 days or more from todays date'. I'm trying to avoid placing an exact date everytime I send an email. Any ideas on how this could be possible?

[Josh_Hill13]

You may be able to say

Class End Date AFTER {{system.date}} where the system date is Today.
Class End Date AFTER (the 90+ days from today), which you would have to enter each time.

But I suspect this isn't ideal.

So if you can set up a Formula Field in SFDC that says TRUE if Class End Date is 90 days or more from Today.

I do not believe you can do this in marketo.