A method and server for determining a creation time of a target page is disclosed. A page network of a plurality of pages including the target page and a plurality of links therebetween is created. Each page is a source or destination page for at least one link. Each page has a creation time and a creation time parameter. An initial value is assigned to the creation time parameter for each page. The creation time parameter of the target page is varied to maximize a page network probability which is based on a link probability for each link which is based at least in part on a difference between the creation time parameters of the source and destination pages thereof. The creation time of the target page is determined to be the value of the creation time parameter thereof which maximizes the page network probability.