there is actually 365 days and six hours in a year, so every four years they add the 6 hours from the previous 3 years and tack it onto the end of Feburary. It's so the earths orbit (which a year is based on) stay's in sync with the rotations around the sun.

1) For the Earth revolution around the Sun, we have: "Orbital period: 365.256366 days 1.0000175 yr " As we want a year with an integer number of days, a good approximation is to take a 365 days year and add it 1 day every 4 years (leap year). Note that the normal year has then 52 weeks and one day. 2) Alternatively, we could wish that the normal year would also have an integer number of weeks. Let us take a normal year of 364 days. We would have about 1.25 days left at the end of one year. 1 year: 1.25 2 years: 2.50 3 years: 3.75 4 years: 5.00 So if we do this, we have to add 5 days to a leap year which would happen every 4 years: so not 364 and 365, but 364 and 369. Not only the normal year would be much more different from the real year than it is now, but the leap year would be much longer than a normal year. Probably this makes this solution not so attractive. Moreover, notice that the leap years would *not* have an integer number of weeks in this solution. 3) To maintain an integer number of week for every year would be even more complicated: 1 year: 1.25 2 years: 2.50 3 years: 3.75 4 years: 5.00 5 year: 6.25 6 years: 7.50; leap year: 1 week, rest 0.50 7 years: 1.75 8 years: 3.00 9 years: 4.25 10 years: 5.50 11 year: 6.75; leap year: 1 week, lacking 0.25 12 years: 1.00 13 years: 2.25 14 years: 3.50 15 years: 4.75 16 year: 6.00 17 years: 7.25; leap year: 1 week, rest 0.25 18 years: 1.50 19 years: 2.75 20 years: 4.00 21 years: 5.25 22 year: 6.50; leap year: 1 week, lacking 0.50 23 years: 0.75 24 years: 2.00 25 years: 3.25 26 years: 4.50 27 years: 5.75 28 year: 7.00; leap year: 1 week, no rest time. Note that we have here: - a 28 years cycle - the leap year comes sometimes after 6 years, sometimes only after 5 years. - the normal year would be even more different from the real year

To Mr Moose, the length of a day and year is decided exactly by the position of the Sun in the sky. These are physical parameters relating to the spin of the Earch and its movement about the Sun. The week is based roughly on the phases of the Moon but has been fixed to exactly 7 days. The number of weeks in a year is 365.2422/7 = 52.177 There are 52 AND A BIT weeks in a year. It's a myth that there are 52 even though many calendars have a week 53 for the part week at the end of the year.