Correcting a document using "track changes" can be very useful when you are editing a document for someone else. But do they really need to know that you were up until 3 a.m. doing the corrections? You can turn off the date and time stamp, which also resets the reviewer's name to "Author."
Removing the Date/Time Stamp
In Microsoft Office Word 2010, go to the Office button menu then click on 'Prepare.'
Then click on 'Inspect Document'.
After MS Word inspects the document, a results panel will appear.
Click the button to remove all "Document Properties and Personal Information."
Save the document. All track changes will have the dates and times removed and the reviewer name will also be changed to "Author."
This process will not work if you're using "custom document" properties. These will also be removed by using the above process.