The length of a planet's day depends on the speed of its rotation. Mars rotates slightly more slowly than Earth does, and so it has a slightly longer day.
668.5991 Mars days.
Mars' period of rotation on its axis is 24.6 hours, so its day is about 36 minutes longer than an earth day. So there would be 41 days on Earth in the same time as 40 days on Mars. If you were working on Mars, you probably would not notice the difference, as you would be taking care of many other things.
A 'year' is the time it takes for a planet to orbit the sun. In the case of earth, this is 365 and 1 quarter days. That is why a year lasts for 365 days and every fourth year ( a leap year) we add up all the odd quarter-days to make an extra day which we put into February - as February 29th. Mars, however, takes 687 (to the nearest day) earth days to go round the sun, so a Martian year is 687 days long - or 1.88 earth years.
Jupiter has a longer year (about 4300 Earth days) than Mars (687 Earth days) because it is much further away from the Sun, and so has a longer distance to travel to complete one orbit (and it also goes more slowly as a result of the distance)
Mars takes about 686 Earth days (1.88 earth years) to revolve around the Sun. Because Mars is farther from the Sun, its orbit is longer, and it moves in that orbit at a slower speed than Earth.
Because Mars rotates slower than Earth
A day on Mars is less than an hour longer. Venus and Mercury have far longer days.
A year on Mars is 1.8808 Earth Years or 686.97 days
An Earth year is 365 Earth days. A Mars year is 686.98 Earth days. A Mars year is 1.88 Earth years.
While a year on Earth 365 days, it is longer on Mars. On Mars, it is not quite 687 Earth days, or 1.88 Earth years.
Venus and Mercury. Mars has 24 hours and 37 minutes in a day.
A day on Mars is almost the same as an Earth day. It is only 39.6minutes longer.
Mars takes just a little longer than earth does, at 24.6229 hours or 1.6 earth days
Longer. A day on Mars is around 39 minutes longer than a day on Earth, and it also takes Mars 668 days to make one trip around the sun (which means that seasons on Mars are also nearly twice as long as seasons on Earth are).
668.5991 Mars days.
Seeing as Mars is further away from Earth, it will obviously take longer and at it's distance of 1.52AU, it takes 687 days to rotate on it's 25.2 degree axis.
Mars has a longer year than Earth (about twice as long) and its day is 24 hours and 38 minutes long.