answers: 1752
context: 4 October 1582 was followed by the first day of the Gregorian calendar, Friday, 15 October 1582 (the cycle of weekdays was not affected). Although Gregory's reform was enacted in the most solemn of forms available to the Church, the bull had no authority beyond the Catholic Church and the Papal States. The changes that he was proposing were changes to the civil calendar, over which he had no authority. They required adoption by the civil authorities in each country to have legal effect. The bull "Inter gravissimas" became the law of the Catholic Church in 1582, but it was </s> the last Thursday in November. Under President Franklin D. Roosevelt, the date was changed to the fourth Thursday in November, an innovation that endures to this day. Together with Christmas and the New Year, Thanksgiving is a part of the broader fall–winter holiday season in the U.S. The event that Americans commonly call the "First Thanksgiving" was celebrated by the Pilgrims after their first harvest in the New World in October 1621. This feast lasted three days, and—as accounted by attendee Edward Winslow—it was attended by 90 Native Americans and 53 Pilgrims. The New England colonists were accustomed to regularly </s> States) adopted the Gregorian calendar in 1752, by which time it was necessary to correct by 11 days. Wednesday, 2 September 1752, was followed by Thursday, 14 September 1752. Claims that rioters demanded "Give us our eleven days" grew out of a misinterpretation of a painting by William Hogarth. In Great Britain, the term "New Style" was used for the calendar and the Act omits any acknowledgement of Pope Gregory: the Annexe to the Act established a computation for the date of Easter that achieved the same result as Gregory's rules, without actually referring to him. With the same Act,
question: when did the us adopt the gregorian calendar