3000-Year Calendar --- 1580 to 1599 A.D.               International Version

Julian ... January 1, 1580 to October 4, 1582           Gregorian .... October 15, 1582 to December 31, 1599

              1580 - 13   1590 -  2     In 1582, the Julian Year Calendar #2 is used up through Thursday
              1581 -  1   1591 -  3     October 4th, when Pope Gregory XIII orders 10 days dropped. This
              1582 - 2/6  1592 - 11     makes the next day Friday October 15th. From this point until
              1583 -  7   1593 -  6     the end of 1582, Gregorian Year Calendar #6 is used.
              1584 -  8   1594 -  7

              1585 -  3   1595 -  1     Click on the "1582 - 2/6" link to view the special year calendar
              1586 -  4   1596 -  9     that was used for the transition (opens in a new window or tab,
              1587 -  5   1597 -  4     depending on your browser).
              1588 - 13   1598 -  5
              1589 -  1   1599 -  6



SEE ALSO:   Was It REALLY Necessary to Drop Those 10 Days in 1582