If no timestamp arguments are specified, the module outputs a random date in the current year. If and are specified, the module outputs a random date between the two timestamps. must be earlier than . If only is specified, the module outputs a random date between the Unix epoch (1 Jan 1970) and the timestamp. must not be earlier than 1 Jan 1970. Formatting can be specified with the parameter. The default formatting is "hh:mm, DD Month YYYY (UTC)" (the same as the default Wikipedia timestamp). The timestamps and the parameter accept values compatible with the #time parser function. Please see the #time documentation for the full range of possible input values and formatting options. If the parameter is set to "yes", "y", "true", or "1", the same date is returned for each module call on a given page.