Julian calendar

Columns: Country | Year starting 1 January | Adoption of new calendar
Holy Roman Empire | 1544 | 1582 | Spain , Portugal | 1556 | 1582 | Prussia , Denmark-Norway | 1559 | 1700 | Sweden | 1559 | 1753 | France | 1567 | 1582 | Southern Netherlands | 1576 | 1582 | Lorraine | 1579 | 1760 | Holland , Zeeland | 1583 | 1582

Example questions:
What is the country that started the Julian calendar in 1797 traditionally known as ? | Which country began the Julian calendar in the year of the Edict of Roussillon ? | In what year did the country that extends from the Baltic Sea to the Pacific Ocean start the Julian calendar ? | What is the largest country in Southern Europe that adopted a new Julian calendar in 1582 ?

Answers:
La Serenissima | France | 1700 | Spain