Changes

*Before entering the month and day, the Western date shown is that of New Year Day of the Japanese year.

*Before entering the month and day, the Western date shown is that of New Year Day of the Japanese year.

*'''For dates Tenshô 10/9/18 (Oct. 4, 1582) and before, dates are in the Julian calendar, but from the next day,  Tenshô 10/9/19 (Oct. 15, 1582) the dates are the Gregorian calendar.''' This change in the western calendar means you cannot just blindly use the program; you need to know which calendar to use for your western date.<ref>Catholic countries in Europe used the Gregorian immediately; some of Holland used it soon; the English changed in 1751; and Russia in 1918. Because of the distance from Europe, the Jesuits in Japan probably heard about the change in July 1585.

*'''For dates Tenshô 10/9/18 (Oct. 4, 1582) and before, dates are in the Julian calendar, but from the next day,  Tenshô 10/9/19 (Oct. 15, 1582) the dates are the Gregorian calendar.''' This change in the western calendar means you cannot just blindly use the program; you need to know which calendar to use for your western date.<ref>Catholic countries in Europe used the Gregorian immediately; some of Holland used it soon; the English changed in 1752; and Russia in 1918. Because of the distance from Europe, the Jesuits in Japan probably heard about the change in July 1585.

To change from Gregorian into Julian, in the 16th and 17th century go back 10 days; in the 18th century, 11 days ["Give us back our eleven days" was the cry when the change was made in England]; in the 19th century, 12 days, and in the 20th and 21st century, 13 days.</ref>

To change from Gregorian into Julian, in the 16th and 17th century go back 10 days; in the 18th century, 11 days ["Give us back our eleven days" was the cry when the change was made in England]; in the 19th century, 12 days, and in the 20th and 21st century, 13 days.</ref>