Read the small print:

If If a date is yellow, then something's due!
*= Word .doc file (If your version of Word produces .docx, then save file as Word 97-03.); .pdf acceptable in some cases
** = Approval of plan required, so do respond promptly with revisions if necessary
Work must be time-stamped by 11:59 PM (Arizona) to be accepted; late work will earn no credit.