Using Show / Hide conditions with the date field

I'm looking for a sort of calculation form but not numbers. Just and IF, THEN type thing. I want to be able to pick the answers. It's for timing on when you order wedding invitations. So for example, let's say you want to give yourself 6 months before the wedding date, to place the order. I want them to be able to choose their wedding date and have it tell you which month to order. For example:

Wedding date: JANUARY

then it tells you need to order by: JULY.

I would just input the values. So if they Choose JANUARY the answer is JULY - are there any widgets that could help me with this?

We do not have such widget, but only since that would be very simple to set up by utilizing our Form Conditions.

I would suggest taking a look at this guide: Smart Forms Using Conditional Logic

If you have any trouble setting it up, do let us know and we would be happy to assist.