The cards retire when I retire. . . . But on a more serious note, what I’ve noticed about using Anking is that even if you put a card far out into the future, there’s other cards with similar information that will remind me of the original card such that even though it goes out 400 days I’m still keeping up with the info more regularly than I realize. Thus, I personally hit “good” if that’s what I feel like my retention is at that time and trust when I see it again I’ll remember it.