noun Date: 1602 a time antedating a period legally fixed as the basis for a custom or right, time so long past as to be indefinite in history or tradition
TIME IMMEMORIAL
Meaning of TIME IMMEMORIAL in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012