one mercury year is about 88 earth days
every_fourth_year_earth's_year has 366_days earth_year is 365_days_long. earth's_year has 365_days earth's_year has not 365_days one_day_on_venus is not 117_earth_days. mercury is planet. one_year has 365.25_days earth_year is not 365_days_long. one_day_on_venus is 117_earth_days.