dateless

/ˈdeɪtləs/
adjective
  1. Without a date; not marked with a date.
    • The museum received a dateless manuscript that required expert analysis to identify its age.
    • She found a dateless letter in the attic, with no year written on it.
    • The old photograph was dateless, so we could not figure out when it was taken.
  2. Timeless; not limited to a particular time or era.
    • The beauty of the sunset felt dateless, as if it could belong to any century.
    • Her poetry has a dateless quality that appeals to readers of all generations.
    • The love story in the novel is dateless, resonating with people from every age.
Antonyms
What does "dateless" mean? | whatsthatwordmean | whatsthatwordmean