A planets day (solar day) is the time it takes to rotate once on its axis relative to the sun, the synodic period. A year on a planet is the time taken for the planet travel once around the sun.
no
Mercury is the planet with an 88-day year.
murcury
A day is 24 hours long and a year is 365 days
Mercury's day is about 58.65 Earth days, and its year about 87.97. Venus has a day that is 243.0 Earth days long, while its year is only 224.7.
That's Mercury: "sidereal day" is more than half its year. Or, it could be Venus: "solar day" is just over half its year.
I`ll assume by a day you mean an Earth day (24 hours). Saturn rather !
23hrs 56 mins, 365 days
24.62 Earth days and 686.78 Earth days.
It's Mercury or Venus, depending on which definition of "day" you use.
The dwarf planet Pluto is the planet with a year 248 earth years long.
The dwarf planet Haumea is the planet with a year 280 earth years long.