Advanced Conditional Formatting?

Hello,

I am looking to create a table with a list of individuals who have completed a specific training and have received a certificate for it. Let's say for example it is CPR Training.

I visualize the "indiviudal's name", the "type of training" and the "date" the training was completed / certificate was received.

What I would like to do is format the "date" cells to change colour. For example, if the CPR training certificate for a specific individual was received on April 17th, 2018 and the training is valid for 2 years (before they need to redo it) (i.e. April 17th, 2020) then I would like the colour to change of the "date" cell to yellow 3 months prior to the expiry date (i.e. starting January 17th, 2020) up until the expiry date at which point it would change to red (indicating that the training certificate is no longer valid and the individual must complete the training again)

I hope this makes sense :)

Thanks for the help!