Starting system
Earth · UTC
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--:--:--UTC
Date Converter
Modify a date or time in either panel to see its equivalent instantly. Type on either side and the other world answers instantly: two clocks, one moment.
Target system
Mars · MTC
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--:--:--MTC
Sols since Epoch
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Sol of the Martian year—
Season (north)—
Earth–Mars distance (approximate)—
Compared with today—
This Martian year lasts—
Conversions are based on this project's custom Martian calendar.
How this tool works and what it shows
The converter translates any Earth date and time (UTC) into Martian date and time (MTC) and back, following the MH-STD-001 Martian calendar.
How the conversion works
- It starts from a fixed point: 6 January 2000 at 00:00:00 UTC is also 00:00:00 MTC (sol 6 of the month Olympo, year 24).
- The time elapsed since that point is computed and divided by the length of the sol: 88,775.244 s (24 h 39 min 35.244 s), i.e. 1.0274912527 Earth days.
- Whole sols are distributed into years of 668, 669 or 670 sols and into 18 months of 37 or 38 sols (letters A to R); the remainder is the Martian time of day: 24 hours of 60 minutes of 60 Martian seconds.
Dates are always stored in UTC; the Martian date is computed when shown. You can read all the rules in the calendar guide.