Dateless
Part of speech: adjective
Definition: Out of one's head; deranged. thick-headed Without a date imprinted, assigned, or associated. Having no date—a meeting with a lover or potential lover. Timeless; immortal Without a start; immemorial Without an end; endless
Sempiternal
Part of speech: adjective
Definition: Seemingly everlasting or eternal.everlasting, that is having infinite temporal duration; as opposed to eternal, outside time and thus lacking temporal duration