My piroriroritchi is 3 years old and HAS BEEN 3 years old for almost 20 hours!!!!!! IT WON'T BECOME AN ADULT!!! (and no, dont ask is I have paused it.....I haven't...)
Last night my Tama -Should have- evolved into a teen.
Instead, It did this morning, about, I'd say 10 hours after it turned one. I dont pause my Tama (I find it un truthful) and still, it took a while to evolve. Some teens evolve at 5 years, and, very rarly at as young as 3 years.
From my experience, the average teen evolves at 4 years.