since time immemorial

US /sɪns taɪm ɪmɪˈmɔːriəl/
UK /sɪns taɪm ɪmɪˈmɔːriəl/
"since time immemorial" picture
1.

desde tiempos inmemoriales, desde que el mundo es mundo

for a very long time, for a period longer than anyone can remember

:
The tradition has been passed down since time immemorial.
La tradición se ha transmitido desde tiempos inmemoriales.
People have been fishing in this river since time immemorial.
La gente ha estado pescando en este río desde tiempos inmemoriales.