Simple Calendar/Scheduler Suggestion Redquested ?

Hello,

Was wondering if anyone might suggest a very simple, uncluttered calendar-scheduler that would reside on my Desktop. Hopefully free.
Would show the calendar for the present month, but clicking on another month and day would bring up a simple screen for some notes.

Would just like a calendar page to pop up for a month I select, and then the ability
to put some notes of a to-do type in a screen for that page.

Really, really simple is what I'm after; truly basic, simple, and uncluttered.
Perhaps it's called a task scheduler that I'm looking for; not sure.

Found many available on the web, but all a bit too much for what I'm after.

Thanks,
Bob

Maybe something like Destkop iCalendar Lite