I created a calendar in Google Sheets. I am using it to schedule appointments for several different clinicians. I was able to create a calendar with a drop down for each month of the year in which the dates appropriately correspond to the appropriate day of the week. I began inputting information for each date and the same information appears in the corresponding cell for every month. How do I prevent that? The cells do not have a formula to have the information copy to the same cell each month.