You are using an outdated browser. Please upgrade your browser to improve your experience.


Paste this code into your website: Customize


Mars-Clock displays accurate, real-time NASA Mars mission data making it a fun, informative, useful, and educational tool.

Currently active NASA Mars missions include: Curiosity Rover, InSight Lander, and Perseverance Rover.

The Mars 2020 Mission, Perseverance Rover, landed on Mars on February 18, 2021.

Information for each Mars Mission is displayed in a simple, easy-to-read format.
Features include:

-Mission Sol: Elapsed time of each mission in Sols (analogous to an Earth day)
-LMST: Local Mean Solar Time (used for mission time)
-Sunrise/sunset times for each mission
-LTST: Local True Solar Time. The time, used in some science applications, that is derived from solar noon.
-MTC: Coordinated Mars Time — Analogous to Universal Coordinated Time (UTC) on Earth
-Earth-Mars distance: Real-time readout in miles or kilometers
-Radio signal delay (one way between Earth and Mars. Real-time readout in minutes of signal delay

Mars-Clock has a simple, easy-to-navigate display:
-Tap the info button for a “Quick User Guide” (tap mission name on Apple Watch)
-Swipe left/right (Long press mission time on Apple Watch) in the large mission box to page through the active missions
-Tap “Earth-Mars Distance” to toggle between units of miles and kilometers
-Earth-Mars Distance display is blue when the distance is decreasing, and red when the distance in increasing