"Old Style" (OS) and "New Style" (NS) are sometimes added to dates to identify which system is used in the British Empire and other countries that did not immediately change. Because the Calendar Act of 1750 altered the start of the year, and also aligned the British calendar with the Gregorian calendar, there is some confusion as to what these terms mean. They can indicate that the start of the Julian year has been adjusted to start on 1 January (NS) even though contemporary documents use a different start of year (OS); or to indicate that a date conforms to the Julian calendar (OS), formerly in use in many countries, rather than the Gregorian calendar (NS). COUNT 5
QSN1 What designation was added to British dates to differentiate them from countries not using the new calendar?  ANS1 "Old Style" (OS) and "New Style" QSN2 When was the Calendar act enacted? ANS2 1750 QSN3 With what did the Calendar Act align the British calendar? ANS3 Gregorian calendar QSN4 What did the use of Old Style and New Style cause? ANS4 confusion QSN5 What law did the British make to cause the use of the Gregorian calendar? ANS5 Calendar Act of 1750