Ad hoc and Up to date

Ad hoc adjective - Made or done without previous thought or preparation.

Up to date and ad hoc are semantically related In some cases you can replace phrase "Up to date" with "Ad hoc", this phrases are similar.

Ad hoc and up to date are semantically related in present topic. Sometimes you can use "Ad hoc" instead an adjective phrase "Up to date", if it concerns topics such as existing.