In these fast developing times, the internet changes quickly it's contents. I have a bookmark list with IT topics and nice tipps for every special case. Unfortunately these pages sometimes change, are not available, or are forum pages where the page of the entry changes. In the end, I cannot use the link anymore because I simply don't find the tries any more.
So my idea is to have the option
Both with exact date/time stamp, to know when you called the page.
As an extension I would propose to have a "recent" stack. So if something changes you still have the "old" content. E.g.: you want to update a tree with all offline content to new versions of it and some pages deliver only "404" pages or page content has changed completely. Then you still have access to your original data.