Populates with what info?
With information that is in a column. For eg-
Column 1 - 27th June 2012
Column 2 - Follow up with client X regarding abc.

That's where?
In an excel file.

Organized how?
I am not sure what are you asking.

Multiple references per date or only one?
Mulitple. Can vary from 1 to 50.

Do you want the calendar to be dynamic centered on today or do you want it to be fed a given month manually?
Completely dynamic. I update the excel sheet, it should auto populate the calender that second.

Sorry for being so generalized, but I am not really aware of Excel jargon. Can we have a solution for my requirement?