Abstract. In order to increase precision in searching for web pages or web documents, taking the temporal dimension into account is gaining increased interest. A particular problem for web documents found on the Internet is that, in general, no trustworthy timestamp is available. This is due to its decentralized nature and the lack of standards for time and date. In previous work we have presented techniques for solving this problem. In this paper, we present a tool for determining timestamp of a non-timestamped document (i.e., a file, an URL or text as input) using temporal language models. We also outline how this tool will be demonstrated.