Translation of "limit before which" into Latin

In archaeology or history, refers to the date before which an artifact or feature must have been deposited. Used withterminus post quem |"limit after which"|. Similarly, terminus ad quem |"limit to which"| may also refer to the latest possible date of a non-punctual event |period, era, etc.|, while terminus a quo |"limit from which"| may refer to the earliest such date.