I found Also show the date for each histogram bar in Stats / Reviews mouseover popup and Year ticks in graphs supporting this suggestion.
I fully support the idea, but at the same time I still like the “500 days ago” that I see in my graphs; it gives me a feeling of achievement haha. So I’d like the “x-y days ago” to stay in the tooltip.
Kinda related:
How can I see Anki stats per year? and Stats for an arbitrary timeframe