To find whether the year of our Lord be leap-year, or the first, second, or third after; divide it by four, and the remainder, if there be any, shews how many years it is after leap-year; but if there be no remainder, then that year is leap-year: Or, you may omit the hundreds and scores, and divide the residue by 4, _Examp._ 1757, omitting the hundreds and the twenties, I divide the residue 17, by 4, and the remainder 1, shews it to be the first after leap-year. [Sidenote: _Julian Account_ or _the Old Style_.] This method of reckoning the year, _viz._ making the common year to consist of 365 days, and every fourth year to have 366 days, is now used in _Great-Britain_ and _Ireland_, and some of the Northern parts of _Europe_, and is called the _Julian Account_, or the _Old Style_. But the time appointed by _Julius Cæsar_ for the length of a solar year is too much; for the Sun finishes his course in the ecliptic, in 365 days, 5 hours, and 49 minutes, which is 11 minutes less than the civil year; and therefore he again begins his circuit 11 minutes before the civil year is ended; and so much being gained every year, amounts in 131 years, to a whole day. So that if the Sun in any year entered the equinox upon the 20th of _March_ at noon, after the space of 131 years, he’ll enter the same point on the same hour, on the 19th of _March_. And therefore the exquinoxes will not always fall on the same day of the month, but by degrees will move towards the beginning of the year. [Sidenote: _Gregorian Account_, or _New Style_.]