What do you hope to achieve by doing that? If you don't complete a Task on
the day you put it in the Calendar, it will be "left behind" when you view
the next day's Calendar. That's not usually a good approach for a To Do
list.
Are you using the TaskPad and setting it to show relevant Tasks on each day?
I hope this helps you at least a little bit!
Judy Gleeson
MVP Outlook
Outlook trainer and author of Productiv_IT with Outlook