Highlighting value, then un-highlighting after a year

[callyleth]

Hi,

I'm not sure if this can be done, but I'm hopeful that someone here can help me

In my spreadsheet, I have names, contract numbers and 4 item columns with dates in them. Ideally, what I would like to happen is the name cell highlights when all the item cells in the row have a value. After the oldest date in the row reaches a year, I'd like it to un-highlight the name cell and highlight the overdue date cell in a different colour. For example, when Dave's row has dates in all 4 item cells, it highlights his name cell green. When the date is 4/3/2020, cell E2 highlights in red and un-highlights Dave's name cell.

I know I'll need to use Conditional Formatting, but what formulas would I need to put in the cells to have them do this?

If this can't be done, what formulas would I use to just highlight the item cell when it has value and then un-highlight when the value is over a year old? For example, cells C2:F2 highlight when I put a date in them, but E2 un-highlights when the date is 4/3/2020

Thanks in advance for any help