# apt-get install gdeskcal
will retrieve and install a small calendar you can park on your desktop. Once installed, just run the command"gdeskcal" (w/o quotes) and the calendar will appear. You can change skins, change size, and re-position by right-clicking on the calendar.

To make the calendar stick (reappear at subsequent boots) you can edit the fluxbox apps file. To do this, right-click on the desktop and choose Fluxbox - File Editing - Apps and add the following:
[startup] {gdeskcal}. Save / Close / Restart Fluxbox.

Gdeskcal works great. Thanks for the tips.

I'm still a noob, so simple tasks sometimes cause me grief. One is getting an app to run without having the terminal window stick around until the app closes. Editing the fluxbox apps file makes gdeskcal stick just fine, but if I want to invoke it myself I edit the fluxbox menu file and add this:

[exec] (Calendar) {gdeskcal}

That way, I get the calendar without the terminal window.