When you open a page, look at the upper left part of the document window, just below the page title. The byline there includes the following information:
- The name (or username) of the user who created the page
- The nameĀ (or username) of the user who last edited the pageĀ (if not the same as the original author)
- The date on which editing last occurred (or the time, if it was a recent edit)