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Martian Christmas

Someone on Twitter said “Merry Martian Christmas”, and I immediately thought, “Wait a moment – Mars has a longer year than Earth, so it’s highly unlikely that an anniversary would coincide on both planets.” So I did some back of the napkin math to calculate the true date of Christmas on Mars. I began with the assumption that Jesus Christ was born on the putative date of 25 December 1 B.C. There’s lots of debate about what year or time of year Christ might really have been born, but no one is rescheduling their Christmas parties over it. To calculate the length of time since the birth of Christ seemed like a tricky proposition, what with all the leap years, and the change from Julian to Gregorian calendar. Fortunately, astronomers have given every day … Read entire article »

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