I assume you have seen the tut for creating a calender here:
http://scrapbook-bytes.com/cgi-scrip...icle_290.shtml.
All you need to do is us eteh blank calender template- choose your month and year. Then copy and paste only the calender part onto your new project and size as desired. Use the marquee tool to remove the days of the week and then type in font you want and position.
To change the font of the days the only option you have is to us e the transparency brush set to 100% and delete the numbers then replace them with your own typing.
HTH