This article at the Connecticut State Library explains the 1752 Calendar Change which we use today but which was adopted in 1752 and affected colonists and how they kept records.

The 1752 Calendar Change affects genealogy record searches and this article helps explain the differences between the older Julian Calendar and the current Gregorian Calendar.

“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.”