To be exact the Earth Day is not 24 hours it is 23 hours 56 minuets and 4 seconds. That's the Earth's rotation time.
Yes, that's the length of the "sidereal day". However the length of the
"solar day" IS exactly 24 hours. That's the time for the Sun to complete
one apparent journey around the sky.
Comment: That answer is for the Earth. Unfortunately, it's not clear which planet this question is about.
A day on Saturn is about 11 hours on Earth.
24 hour
It should be --- Earth Day, Planet Earth.
This is planet Earth, so one Earth day is one day on this planet.
24.62 Earth days and 686.78 Earth days.
Mercury is the planet with an 88-day year.
Mercury.
16.11 hours.
It means the planet rotates slower. To be precise, the angular velocity is less.
A day is 9.1 hours unlike earth which is 24 hours in a day.
It is possible, but not for a long long long long long long long long time.
I`ll assume by a day you mean an Earth day (24 hours). Saturn rather !