Double dating pdf
During the Middle Ages, it began to became apparent that the Julian leap year formula had overcompensated for the actual length of a solar year, having added an extra day every 128 years. By 1582, seasonal equinoxes were falling 10 days "too early," and some church holidays, such as Easter, did not always fall in the proper seasons.In that year, Pope Gregory XIII authorized, and most Roman Catholic countries adopted, the "Gregorian" or "New Style" Calendar." As part of the change, ten days were dropped from the month of October, and the formula for determining leap years was revised so that only years divisible by 400 (e.g., 1600, 2000) at the end of a century would be leap years.Finally, 11 days were dropped from the month of September 1752.The changeover involved a series of steps: Out of context, it is sometimes hard to determine whether information in colonial records was entered "Old Style" or "New Style." Some examples: In the Public Records of the Colony of Connecticut, "A Corte at New Towne [Hartford] 27 Decr.1636" is immediately followed by a court held "21 Febr.1636," which is followed, in turn, by "A Cort att Hartford, Mrch 28th, 1637".Today, Americans are used to a calendar with a "year" based the earth's rotation around the sun, with "months" having no relationship to the cycles of the moon and New Years Day falling on January 1.However, that system was not adopted in England and its colonies until 1752.
This calendar employed a cycle of three years of 365 days, followed by a year of 366 days (leap year).
The Julian Calendar was replaced by the Gregorian Calendar, changing the formula for calculating leap years.
The beginning of the legal new year was moved from March 25 to January 1.
In fact, in Latin, September means seventh month, October means eighth month, November means ninth month, and December means tenth month.
Use of numbers, rather than names, of months was especially prevalent in Quaker records.
Legacy supports the practice of double dating to handle the time period between the changeover from the Julian to the Gregorian calendar.