A Leap Year.
February. This is because the earth actually takes 365.25 days to rotate the sun, so every four years there is a build up of 1 extra day, hence the extra day in Feb, on the 29th, aka leap year. _____________________________ The actual time for Earth to orbit the Sun is not 365.25 days, but 365.2422 days. So adding one leap day in every 4 years still leaves an error of about 1 day in a century. This is why "century" years, years divisible by 100, are NOT leap years; so 1900 was not a leap year, and 2100 won't be. But because even that isn't QUITE accurate, we do need to add a day every 400 years. So 2000 was a leap year, and the year 2400 will be. This system was proposed by the Council of Trent in 1563, and ratified by Pope Gregory, so this calendar is called the "Gregorian Calendar".
You can get extra work if you ask your boss or teacher. Who, who we do !!
It gives you extra health.
A lot of watches have a perpetual calendar, it even knows that leap years have 29 days in February. Source: http://en.wikipedia.org/wiki/Perpetual_calendar
A solar calendar follow the phases of the sun which gives us equinoxes and solstices whereas a lunar calendar follows the phases of the moon and it's cycles.
Most calendars are based on the Earth's movement round the Sun. The Gregorian calendar is used in most countries and it has 365 days in a year, with an extra day (February 29) in 97 years out of every 400, which are called leap years. This gives an average year of 365.2425 days.
The Jewish calendar has 12 months. They are Tishre, Chesvan, Kislev, Tevet, Shevat, Adar, Nissan, Iyar, Sivan, Tamuz, Av, Elul. However, during a leap year, an extra month is added. So during a leap you you have Adar I and Adar II which gives you 13 during a leap year.
well.
Gives you an extra tactical grenade and an extra lethal grenade.
Yes it also gives the wether of all year.
photosynthesis! (i think)
According to the estimated population of the United States based on the true population in the 2010 census, as of today, March 7, 2011, there is 310,946,861 people. Taking that number and dividing it by 365 gives you 851,909 people who have any of the regular birth dates on the calendar. If you divide that number by 4, you will get the approximate number of people with birthdays on February 29th, which is 212,977.