I have not dinked around with Outlook Calendars, but here is a general concept view. I'm going to underscore certain keywords you will need to look up and understand.
You first need to see about how to use COM (Active X) programming to create an Outlook Object, then you will have to open a collection in that object. You will probably have to do a .Add method in that collection to insert a calendar event that includes your text and a date. (I'm saying a .Add method, but Outlook is strangely persnickety about what events and methods it expects, so you might have to browse Outlook's methods to see what the correct verb happens to be.)
Now, how do you do all of that? You can find help on using VBA with Office. Access will give you some help on how to create an application object. You will have no choice but to open Outlook and browse through its own help files to find out its COM structure, basically a list of the object elements available for program interaction. You have a lot of bleary-eyed reading ahead of you, but if you have Access and Outlook on your computer, you have the tools you need to do the reading already.
A hint about Outlook's persnickety viewpoint: If you want to open up something like a message that you are about to send, you have to open up an INSPECTOR - which is the name they give to a programming interface. It's not a window because to the user, it isn't visible. (If you can't see it, it isn't a window, right?) Anyway, try to take their odd nomenclature in stride. Laugh at the product. Or cry and get it out of your system like I did the first time I had to muck about with it.
