Automatic Date setting in Word

When you receive an attached word document and download it, the date on the document changes to the current date.  What if I need the original date to stay?

The feature you are referring to is found in the menu option Insert. Then click Date and Time, (located in the text section of the ribbon).  The sender, in this case, has control of whether the date of the letter will automatically change or not.  That option is at the bottom where a check box to Update Automatically is found.  If you are the sender and want to alter the auto date feature, change the check box to either be checked, where the date will change every time it is opened or unchecked where the original date will remain.  You can also change the format of the date by selecting one of the options in the left side column.