How many seconds are in a year?

There are 31,536,000 seconds in a regular year (365 days). However, during a leap year (366 days), there are 31,622,400 seconds. This is because a leap year occurs every four years, and an additional day is added to the calendar to make up for the extra time it takes the Earth to orbit the sun. The calculation of the number of seconds in a year is derived from the fact that there are 60 seconds in a minute, 60 minutes in an hour, 24 hours in a day, and either 365 or 366 days in a year.