Mars. A "day" on Mars - which astronomers working with the Lunar Rovers call a "sol" - is about 24 hours 39 minutes 35 seconds.
That's a "solar day". The "sidereal day" is a couple of minutes shorter.
Mercury's "sidereal day" is about 59 Earth days long and its year is about 88 Earth days long. Venus has a "solar day" of about 117 Earth days and a year of about 225 Earth days.
There isn't such a planet called planet trio, not in our solar system at least. A planet trio refers to three planets seen in the same area of the sky, tightly bunched as viewed from earth. For example, you may see mercury, Venus and Jupiter all close together in the sky and could call it a planet trio.
A day is 24 hours long and a year is 365 days
The planet is Mercury. (Some people think it is Venus, but it is Mercury.)
One day on Neptune equals 16 hours and 6 minutes. This is the same as about 0.67 of an Earth Day.
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.
A day is 9.1 hours unlike earth which is 24 hours in a day.
It means the planet rotates slower. To be precise, the angular velocity is less.
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 !