3 months was how long I owned them. I didn't look at the DOT date on all 4, but the 2 I have left were mid 2019, so roughly 9 months before I bought them. The two new ones are the beginning of 2020, so roughly 9 months before I got them haha.
When I originally purchased, my local Discount Tire only had 3. Another Discount Tire across the city had 1. So I went to that store and snagged the tire while my local store worked on the other 3, then they installed the 4th when I got back with it.
Tires rode great until about 4k miles. The two old ones on the car, with the mid 2019 date, still ride great.
I may get a new car but probably not that 2019. The issue with that is they won't beat the deals you can get on 2020s. And the moment I drive a 2019 off the lot, kbb says it's worth about $7k less than if I bought a 2020 and drove it off the lot.
The value just isn't there for me on the 2019.