The closest Outlook can come to a built-in method for sending a calendar as a single file attachment is to export the Calendar folder to a file, then sending the exported file. That, of course, won't produce the kind of document you're looking for.

However, if you have Word, you can use one of the Word templates listed at http://www.slipstick.com/addins/calendar.htm#print to push the Outlook data into a Word document, then attach that document to a message.

If you have Visio 2003, you can use the Import Outlook Data Wizard to create a calendar from Outlook data, using a filter to include only certain appointments. The resulting .vsd file can then be sent as an attachment.

For a VBA code solution that creates an HTML-format mail message containing any single day's appointment list, see http://www.outlookcode.com/codedetail.aspx?id=24 .

Printing to a PDF printer driver would work, if you have something like that installed.

Another technique is to use a third-part tool called ClipForm (http://www.ivitar.com/clipform/). This tool uses templates to export Outlook data -- a whole folder or selected items -- to the Windows clipboard, text file, HTML email message, or other file types.