No Desktop Calendar ?

Calendar is something we all need to refer to while planning things. I have been a Linux (with KDE) user. KDE has a small calendar app which pops up every time you click on the date. It just lets u go thru the dates if you are not an admin. Makes perfect sense. I recently installed Win XP - SP3 and I realized that unfortunately a normal user (who is not an admin) CANNOT double click the date to see the calendar. So I begun hunting for a simple solution that is
1) Light weight
2) Does not come with a lot of nonsense I don't need.
3) Is installable as a non-admin user.
4) which just sits in the corner (say system tray) and is invoked if and only if I click it.

Surprisingly I haven't found ANYTHING that satisfies all three conditions. Almost ALL of them need administrative privileges which is something I find hard to understand. Why do you need admin privilege to build an app which provides READ ONLY access to system date. I cannot understand this ...
Even mighty google does not have solution. There calendar widget is the funniest widget I have ever seen. It keesp changing size for no apparent reason(also BTW Google widgets need a platform installation which again needs admin privilege. And I realized that I dont need most of the stuff it offers).

So far the best I have is a firefox add on which sits in the corner of my FX3 and provides the same functionality. But if anyone knows of a simple solution that works please let me know.