I know the original dates etc for the Ares III mission because of the movie promo stuff enter image description here but when their plans got messed up because of Watney being left behind does anyone know the dates (even rough dates or a month will do) of:

  • When they rescued Watney
  • When they actually got back to earth
  • When that movie Beck/Beth baby scene
  • When the Mark Watney teacher scene was.
  • The time it takes to get from Mars to Earth in the Hermes
  • 3
    In the book Watney's rescue happens on "Mission Day 687" (or the preceding day, whatever), so one can get the first day of the mission and add to that. Commented Dec 30, 2017 at 22:16
  • Using this method if they left on 7th Nov 2035 they rescued Mark on Thursday, 24th September 2037. Now I just need to know how long a journey from Mars to Earth in the Hermes is and I'm golden. Commented Dec 31, 2017 at 1:19
  • Well I found on this video that it took 211 days to get back to Earth so I'll stick with that. Commented Dec 31, 2017 at 1:38

1 Answer 1


Mark would have been rescued on Mission Day 687 as stated in the book which is Thursday, 24th September 2037.

According to this it then took 211 days to get from Mars orbit to Earth in the Hermes so Friday, 23rd April 2038 was when they got back.

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