But, it turns out that Lauren Schmidt Hissrich and her team had too many other details to keep track of when plotting the timeline shifts of Season 1, and regular ol’ musically-inclined human Jaskier and his descent into middle age just fell by the wayside.
Technically, the first season alone should have seen Jaskier age to at least his mid-30s, so it makes total sense that a lot of fans simply figured he was some kind of magical bard man who either doesn’t age, can hide his age like Yenn, or simply ages very slowly à la Geralt.