19) Name two ways the traditional calendar changed?

Throughout history there have been numerous attempts to convey time in relation to the sun and moon.  Even now the Chinese and Islamic calendars are based on the motion of the moon around the earth, rather than the motion of the earth in relation to the sun, and the Jewish calendar links years to the cycle of the sun and months to the cycle of the moon.

The Julian Calendar

In 45 B.C., Julius Caesar ordered a calendar consisting of twelve months based on a solar year.  This calendar employed a cycle of three years of 365 days, followed by a year of 366 days (leap year).  When first implemented, the "Julian Calendar" also moved the beginning of the year from March 1 to January 1.  However, following the fall of the Roman Empire in the fifth century, the new year was gradually realigned to coincide with Christian festivals until by the seventh century, Christmas Day marked the beginning of the new year in many countries.  

By the ninth century, parts of southern Europe began observing first day of the new year on March 25 to coincide with Annunciation Day (the church holiday nine months prior to Christmas celebrating the Angel Gabriel's revelation to the Virgin Mary that she was to be the mother of the Messiah). The last day of the year was March 24. However, England did not adopt this change in the beginning of the new year until late in the twelfth century.

Because the year began in March, records referring to the "first month" pertain to March; to the second month pertain to April, etc., so that "the 19th of the 12th month" would be February 19.  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.

The Gregorian Calendar

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.  However, no adjustments were made to compensate.  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.  January 1 was established as the first day of the new year. Protestant countries, including England and its colonies, not recognizing the authority of the Pope, continued to use the Julian Calendar.  

Double Dating

Between 1582 and 1752, not only were two calendars in use in Europe (and in European colonies), but two different starts of the year were in use in England.  Although the "Legal" year began on March 25, the use of the Gregorian calendar by other European countries led to January 1 becoming commonly celebrated as "New Year's Day" and given as the first day of the year in almanacs.

Changes of 1752

In accordance with a 1750 act of Parliament, England and its colonies changed calendars in 1752. By that time, the discrepancy between a solar year and the Julian Calendar had grown by an additional day, so that the calendar used in England and its colonies was 11 days out-of-sync with the Gregorian Calendar in use in most other parts of Europe.  

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". Although it may first appear that the February session was entered out of sequence, the arrangement is actually correct.  Under the "Old Style" calendar and legal new year, 1636 began on March 25.  December 1636 was followed by January 1636 and February 1636, and 1636 continued through March 24.

Although current historical scholarship calls for retention of Old Style dates in transcriptions, historians and genealogists need to be aware that some people living at the time converted the date of an event, such as a birthday, from Old Style to New Style.  George Washington, for example, was born on February 11, 1731 under the Julian Calendar, but afterwards recognized the date February 22, 1732 to reflect the Gregorian Calendar.

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