There's nothing particularly in FP that would enable you to do this.
Try a script from
http://javascript.internet.com or
www.hotscripts.com
Either javascript, ASP, PHP or PERL - (whatever your server supports). These
scripts range from "date pickers" to displaying a full month's calendar, which
enables you to insert events, and then have hyperlinks open another window/go to
another page with details of that event.
Do you want something that elaborate, or just something that basically gives the
current date?
Do a Google search as well.