One year consists of 12 months, and usually lasts 365 sidereal days. A sidereal year is the time when the round takes a complete turn around the sun.

There are different types of year, which have been adopted by various cultures through the ages, among them: The sidereal year, the solar year and the calendar year, which is used for the measurement of religious holidays.

Astronomers discovered after several studies that during a period of every four years 366 days are counted, and this year it is called a leap.

(See also how many weeks are in a year exactly).

Contents

## Exactly

Every year is exactly 365 days, 5 hours, 48 minutes and 46 seconds. This is why exist normal years and leap years

## Normal Year

One normal year has 365 days. The year is divided into 12 months, which have 30 or 31 days, except February that has 28.

## Leap Year

One leap year has 366 and it occurs every four years (see more about why is there a leap day and when is the next leap year) The year is divided into 12 months, which have 30 or 31 days, except February that has 28.

## Without weekends

If you don’t want to count weekends then the number of days is **261** = 365 – 104 (number of Saturdays and Sundays).

## On other planets

### On Mars

687 days which is the mars orbital period around the sun.

### On Venus

225 days which is the mars orbital period around the sun.

### On Mercury

88 days.

### On Jupiter

4.333 days.

### On Saturn

10.759 days.

### On Uranus

30688 days.

### On Neptune

60182 days.