immemorial (adj) - for an exceedingly long time; extending back beyond memory or record; so old that no one remembers its beginnings [im-uh-mohr-ee-uhl]
BREAKDOWN: IM- (not) + MEMOR- (remember) + -IAL (pertaining to)
a memorial is a ceremonial time, place, or object meant to preserve or honor a memory
memorial means designed to preserve or honor a memory; of or pertaining to memory
“Our sages developed music from time immemorial to take shelter in one's true self. Real music is not for wealth, not for honors, or not even for the joys of the mind - it is a path for realization and salvation.” —Ali Akbar Khan