since time immemorial

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

sejak zaman dahulu kala, sejak dulu sekali

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

:
The tradition has been passed down since time immemorial.
Tradisi ini telah diwariskan sejak zaman dahulu kala.
People have been fishing in this river since time immemorial.
Orang-orang telah memancing di sungai ini sejak zaman dahulu kala.