Julian calendar

“ To bring matters into order, Suetonius, in his life of Julius Cæsar, 40, says, they were constrained to make one final year of fifteen months, to close the confusion.
Hence arose the Julian or Solar year, the year of the Christian world. The “alteration of the style” is only an amendment of the Julian calendar, in one particular, by Pope Gregory, in 1582. In 325, A. D., the vernal equinox occurred March 21, and in 1582 it occurred March 10. ”

“ If Julius and his successors altered only by slight additions, and if the calendar which they had to work on was of great antiquity and unchanged during the Republic, how, in the next place, are we to distinguish the skeleton of that ancient calendar from the Julian and post-Julian additions? Nothing is easier; in Mommsen’s words, it is not a matter of calculation ”

“ On the other hand, as the golden numbers were only adapted to the Julian calendar, every omission of the centenary intercalation would require them to be placed one line lower, opposite the 6th, for example, instead of the 5th of the month; so that, generally speaking, the places of the golden numbers would have to be changed every century. On this account Lilius thought fit to reject the golden numbers from the calendar, and supply their place by another set of numbers called Epacts, the use of which we shall now proceed to explain. ”

“ The calendar thus altered is called Gregorian to distinguish it from the older, Julian calendar, and it found speedy acceptance in those civilized countries whose Church adhered to Rome; but the Protestant powers were slow to adopt it, and it was introduced into England and her American colonies by act of Parliament in the year 1752, nearly two centuries after Gregory's time. In Russia the Julian calendar has remained in common use to our own day, but in commercial affairs it is there customary to write the date according to both calendars—e. ”

“ After the Julian calendar had been used several centuries, the improved state of astronomy disclosed the fact that computed time did not keep pace with actual time, because the year did not consist of three hundred and sixty-five days and six hours but was about eleven minutes ten seconds less. Hence, by inserting an extra day for leap year, we gain upon true time forty-four minutes, forty seconds, which makes an error of a day in about one hundred and thirty-one years ”

“ The basis of our knowledge of the old Roman religious year is to be found in the fragments of calendars which still survive. None of these indeed is older than the Julian era; and all but one are mere fragments. But from the fragments and the one almost perfect calendar we can infer the character of the earlier calendar with tolerable certainty.
The calendar, as the Romans generally believed, was first published by Cnaeus Flavius, curule aedile, in 304 B.C., who placed the fasti conspicuously in the Forum, in order that every one might know on what days legal business might be transacted [27] ”

“ Now, in 1257 years the Earth performs 1257 annual and 459,109 daily revolutions, after which the vernal equinox was found to occur on the 21st of March, true or solar time; thus concurring with the vernal equinox of 325. But the erroneous Julian calendar would make the Earth perform 459,119 daily revolutions to complete the 1257 years, a discrepancy of ten days, making the vernal equinox to fall on the 11th instead of the 21st. It will be seen by the diagram that the ten days were deducted from October, in 1582, making it a short month, consisting of only twenty-one days. ”

“ II. If we were to believe certain writers of high reputation, we should be deterred from attempting to fix any dates for the second of Caesar’s expeditions; for our principal sources of information are dates mentioned by Cicero in his letters; and, as everybody knows, the Roman calendar, before Caesar’s reform, was often in disagreement with the Julian calendar. ”

“ The moon’s age set forth in the Julian Calendar.
January, on the Kalends, one day, the moon’s first (day) ; on the Nones, the 5th day, the moon’s 5th; on the Ides, the 13th day, the moon’s 13th. On the day before the Kalends of February, the 31st day, the moon’s 1st; on the Kalends of February, the 32d day, the moon’s 2d; on the Nones, the 36th day, the moon’s 6th; on the Ides, the 44th day, the moon’s 14th. On the day before the Kalends of March, the 59th day, the moon’s 29th; on the Kalends of March, the 60th day, the moon’s 1st; on the Nones, the 66th day, the moon’s 7th ”

“ Although Scotland had accepted the Gregorian calendar in 1600, until 1752, England still followed the Julian calendar (after Julius Caesar, 44 B.C.) , and celebrated New Year's Day on March 25th (Annunciation Day) . Most Catholic countries accepted the Gregorian calendar (after Pope Gregory XIII) from some time after 1582 (the Catholic countries of France, Spain, Portugal, and Italy in 1582, Belgium, the Netherlands, and Switzerland within a year or two, Hungary in 1587, and Scotland in 1600) , and celebrated New Year's Day on January 1st. ”

“ In Russia, Greece, and the East generally, the Old Style is still retained. Sir H. Nicolas, Chronology of History. CALENDAR, Julian. Julian Era. "The epoch of the Julian Era, which precedes the common or Christian Era by forty-five years, is the reformation of the Roman calendar by Julius Cæsar, who ordained that the Year of Rome 707 should consist of 15 months, forming altogether 445 days ”

“ But every leap year one day must be added to the lunar month in which the 29th of February is included. Now if leap year happens on the first, second or third year of the period, there will be five leap years in the period, but only four when the first leap year falls on the fourth. In the former case the number of days in the period becomes 6940 and in the latter 6939. The mean length of the cycle is therefore 69393/4 days, agreeing exactly with nineteen Julian years.
By means of the lunar cycle the new moons of the calendar were indicated before the Reformation. ”

“ Thus, for the year 1892, we have (1892 + 3) ÷ 15 = 126, remainder 5. Therefore, 5 is the number in the cycle.
The Julian period, proposed by the celebrated Joseph Scaliger, as an universal measure of chronology, is a period of 7980 years, and is formed by the continual multiplication of the three numbers, 28, 19 and 15; that is, of the cycle of the sun, the cycle of the moon, and the cycle of indiction. Thus, (28 × 19 × 15) = 7980. In the course of this long period no two years can be expressed by the same numbers in all the three cycles. ”

“ Embolismic year, a year of thirteen lunar months or 384 days, occurring in a lunisolar calendar like that of the Jews; Hebrew year, a lunisolar year, of 12 or 13 months of 29 or 30 days—in every cycle of nineteen years the 3d, 6th, 8th, 11th, 14th, 17th, and 19th having thirteen months instead of twelve; Julian year, a period of 3651⁄4 days, thus causing an annual error of about 11 minutes—corrected by dropping 10 days in 1582 under Pope Gregory XIII.—not adopted in England till 3d September 1752, which became September 14 (see Style) ”

“ The Roman calendar was in early times even more confused than the Greek. There appears to have been at one time a year of either 304 or 354 days; tradition assigned to Numa the introduction of a cycle of four years, which brought the calendar into fair agreement with the sun, but made the average length of the month considerably too short. Instead, however, of introducing further refinements the Romans cut the knot by entrusting to the ecclesiastical authorities the adjustment of the calendar from time to time, so as to make it agree with the sun and moon. ”

“ If, then, it should appear that these races possessed and incorporated into their mythologies a knowledge of the Zodiac, and of the first degree of Aries as its initial point, their separation from the parent stock must have been subsequent to the formation of the scheme that dealt with a calendar based on an observation of the colure of the winter solstice at that point, and under this supposition the date of 6,000 B.C. becomes a foothold for the chronology of ancient history. ”

“ These documents are all dated in such and such a month of such and such a year of some king’s reign; the months are the same (at first under their earlier Accadian names [3] ) as those we [5] find in the almanacs translated by Epping and Strassmaier, and we meet in them, and in other historical inscriptions, with the intercalary months, the second Elul, and the second Adar. It would seem, then, that it was the same calendar, worked in the same way, that held its place through these two thousand years. ”

“ Until 304 B.C. the lore of the calendaria remained the exclusive and lucrative monopoly of the priesthood; but in that year Gnaeus Flavius, a pontifical secretary, introduced the custom of publishing in the forum tables containing the requisite information, besides brief references to victories, triumphs, prodigies, &c. This list was the origin of the public Roman calendar, in which the days were divided into weeks of eight days each, and indicated by the letters A-H. Each day was marked by a certain letter to show its nature ”

“ Meyer has specially pointed out, must have begun to run its course in a year in which the rising of Sirius and New Year’s Day coincided, i. e. it began with a Sothic period.
The months within each season are numbered from I to IV. Among primitive peoples it frequently happens that a season gives its name to two months, which are distinguished as the first and second, but a numbering such as that of the Egyptian calendar is unexampled and shews once more a desire to get away from the moon-month. The so-called ‘months’ are rather subdivisions of the seasons. ”

“ When the Romans had begun to advance in civilization, no people ever made a more rapid progress in all the arts and abuses which follow in its train. Astrology came with astronomy from the East, for science had speedily been converted into a craft, and in the age of the Cæsars the Egyptian professors of that craft were among the pests of Rome.
More than one Roman calendar is in existence, preserved by the durability of the material, which is a square block of marble. Each side contains three months, in parallel columns, headed by the appropriate signs of the zodiac. ”

“ In consequence of the solar and lunar equations, it is evident that the epact, or moon's age at the beginning of the year, must, in the course of centuries, have all different values from one to thirty inclusive, corresponding to the days in a full lunar month. Hence, for the construction of a perpetual calendar, there must be thirty different sets or lines of epacts. ”

“ If we now find this inconspicuous part of the heavens equally honoured by several nations in very ancient times, we shall be led to think either that these nations, independently of each other, happened to observe and mark out the sun’s annual course through the heavens at exactly the same date, and therefore chose the same point as marking the winter solstice; or we must suppose that they derived their calendar and knowledge of the Zodiac from observations originally made by some one civilized race. ”

“ When P = 2 the new moon falls on the ninth, and the epact is consequently twenty-two; and, in general, when P becomes 1 + x, E becomes 23 − x, therefore P + E = 1 + x + 23 − x = 24, and P = 24 − E. In like manner, when P = 1, l = D = 4; for D is the dominical letter of the calendar belonging to the 22nd of March. But it is evident that when l is increased by unity, that is to say, when the full moon falls a day later, the epact of the year is diminished by unity ”