There are 60 x 60 x 24 x 365 = 31,536,000 seconds in a year

During leap years, an extra day is added on to the end of February i.e. February 29th. This is to compensate for the fact that the orbit of the Earth around the Sun is approximately 365.25 days. Adding a day allows the Earth to "catch" up in its orbit. So the number of seconds is then :

60 x 60 x 366 = 31,622,400 seconds

Because the length of a year is not exactly 365.25 days, the Gregorian calendar was devised to correct the inconsistency. So leap years occur every 4 years when the year is divisible by 4. If the year is divisible by 100 it is not a leap year unless it is divisible by 400 in which case it is a leap year.

Because the length of a solar day is slightly more than 24 hours, if no compensation were made, the Sun would loose sync with UTC (Universal Coordinated Time) and noon would occur later and later in the day. So leap seconds are added on to days every so often.

There are 86,400 seconds in a day (60 seconds in a minute, 60 minutes in an hour=36,000 seconds in an hour x 24 hours in a day= 86,400).

86,400 seconds in a day times 365 days in a year= 31,536,000 (thirty one million, five hundred thirty six thousand seconds)

1 Minutes = 60 seconds

1 Hour = 60minutes

=(60*60)seconds

1Hour =3600second.

1day = 24Hours = (24*3600)

1day =86400 seconds.

But

1 year = 365days

= (365 * 86400)

= 31536000 seconds

There are 86400 seconds in a day. 60 seconds in a minute x 60 minutes in an hour x 24 hours in a day.

Oops put it in wrong one - seconds in a year is 60 seconds x 60 mins x 24 hours x 365 days = 31536000

As there's 86.400 seconds in a day and there's 365 days in a year, you just have to count 86.400x365.

And the result is 31.536.000.

So there are 31.536.000 seconds in a year.