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The Perseverance rover landed February 18, 2021 at 20:55 UTC, Earth-time. What time was it on Mars when Perseverance landed?

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    $\begingroup$ Which "Mars calendar" do you believe in? Event time or Earth receive time? (you have given Earth receive time) What time system? What representation in what time system? Time is a messy construct... $\endgroup$ Apr 22 at 17:59
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    $\begingroup$ @BrendanLuke15 How about local solar time? $\endgroup$
    – usernumber
    Apr 22 at 18:14

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Perseverance landed in the late afternoon, at around 15:54 Local Mean Solar Time according to Wikipedia.

This image taken at 15:51:55 by Perseverance's Lander Vision System Camera is from some way above the surface, this one is on the ground at 15:53:58.

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