Thank you Bucklash for replying. At least you are trying.
I also thought of the server time zone being different than where I'm important as a possible issue also. However, the time zone of the server is only a couple of hours away from where I am importing, so why would it deduct an entire day? Especially when the import was done in the late morning or early afternoon, not close to midnight.
I ended up going into the spreadsheet and adding a day to all of the dates before I imported, but I shouldn't have to do this.
But at least you replied .....