Folk tales and time slippage

There are some coincidental parallels to this kind of time dilation in old folk tales.

The Irish tale of Oisín describes the warrior’s journey to Tir na nÓg, the land of youth. He spends three years there but when he returns to Éire to see his old fighting comrades from the Fianna, 300 years have passed.

This story gives us a wonderfully poetic turn of phrase that’s still used today. The closest English equivalent is “Billy no mates”, a rather cruel term to describe someone with no friends. In Irish, we say: Like Oisín after the Fianna.

— Adactio, Dilation