If a date is over a year old, I would like the cell to show "yyyy", otherwise "mm/dd".
I've tried:
<date(year(today())-1,month(today()),day(today()))]yyyy;mm dd
<date(year(today())-1,month(today()),day(today()))]yyyy;mm dd
<date(year(today())-1,month(today()),day(today()))]yyyy;mm dd
[<...