Anachronistic (adjective)

1. Out of its proper time period, especially by being too old or too modern.
2. Belonging to a period other than that in which it is currently placed.

Origin:

Mid 19th century: from greek anakhronistikos, from anakhronizesthai "to refer to a wrong time", from ana- "back" + khronos "time".

Examples:

1. The movie's use of anachronistic technology made it difficult to suspend disbelief.
2. The play's anachronistic costumes were a jarring contrast to the historical setting.
3. The anachronistic references to smartphones in the novel set in medieval times.
4. The use of anachronistic weapons in the video game set in ancient times.
5. The anachronistic use of a computer in the 1950s film.