Mars Clock shows the real current time on Mars using two scientifically accurate systems. MTC (Mars Time Coordinated) divides the Martian sol into 24 hours where each second is 1.02749 Earth seconds long. MUTC uses Earth-length seconds but a full sol lasts 24 hours 39 minutes and 35 seconds. The 24 Martian time zones are anchored to real geographic landmarks: Airy-0 crater serves as the prime meridian, Jezero Crater is where NASA Perseverance rover landed, Gale Crater is the Curiosity rover landing site, Olympus Mons is the tallest volcano in the solar system, and Valles Marineris is the Grand Canyon of Mars. The interactive 3D globe displays a real-time day and night terminator based on actual current Martian solar time. Mars Sol Date calculation follows the standard formula by Allison and McEwen 2000.