Joined X years ago: it rounds up but I don't think it should

I joined on June 1st, 2020. Today is December 30th 2021, so it's been about 1.5 years.

Under my username, it displays as "Joined 2Y ago." So it's rounding up. I think it makes more sense to display years + months, or days, or maybe any other way that doesn't make it round up.