You and a Friend Go Outside to View the Stars

Multiple Choice

You and a friend go outside to view the stars at midnight tonight. Six months later, you go outside to find the stars in exactly the same position in the sky as when you and your friend viewed them. What time is it? Assume you can see the stars at any time, day or night.

A) 6 A.M.
B) noon
C) 6 P.M.
D) midnight
E) This can never happen.