in/within living memory
In a recent enough time as to be remembered by people who are alive today. (Usually used in negative statements.) There hasn't been a blizzard like this in living memory!
in (or within) living memory
within or during a time that is remembered by people still alive.in/within ˌliving ˈmemory
that can be remembered by people who are alive now: These are the worst floods in Britain within living memory.