Explore Mars with JMARS
Mars Calendar
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Mars days are a little longer than Earth days because Mars rotates a little slower. Mars years are longer because it takes about twice as long for Mars to revolve around the sun. Assigning Mars a data "date" needed an agreed upon system.
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Scientists date Mars data with a system that uses Earth year1955 as a Mars day 1. Our Earth 2021 is Mars year 36, in this system. To convert collected Mars data in Mars years to an Earth date, click here: Convert Mars Date to Earth Date
Click here for a diagram of Martian Seasons and Solar Longitude
To find out how more about the Mars calendar, and how Mars climate seasonal extremes are related to Mars tilt, rotation and revolution, and the location on Mars, click here:
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