Frank's Humble Abode at frankosite2020.com .... formerly known as frankosport.com
The Perpetual Calendar: Was It Really Necessary To Drop Those 10 Days in 1582 ??



Dropping the 10 Days in 1582

Pope Gregory XIII's ruling that dropped 10 days all at once in October 1582 was not a popular move
with many people, particularly businessmen. Some papal advisors suggested that the calendar
revisions should be phased in over a broad period of time. However, Pope Gregory ordered that
the revised calendar was to be put into effect right away.

Now, we will suppose that Pope Gregory did approve a phase-in period of some kind. Presented below,
along with the actual sequence of events, are two possible alternative phase-in period scenarios.
A: Actual Year Calendar Sequence, 1580 to 1629,
   as ordered by Pope Gregory XIII

  1580, 13    1590,  2    1600, 14    1610,  6    1620, 11
  1581,  1    1591,  3    1601,  2    1611,  7    1621,  6
  1582, 2/6   1592, 11    1602,  3    1612,  8    1622,  7
  1583,  7    1593,  6    1603,  4    1613,  3    1623,  1
  1584,  8    1594,  7    1604, 12    1614,  4    1624,  9
  1585,  3    1595,  1    1605,  7    1615,  5    1625,  4
  1586,  4    1596,  9    1606,  1    1616, 13    1626,  5
  1587,  5    1597,  4    1607,  2    1617,  1    1627,  6
  1588, 13    1598,  5    1608, 10    1618,  2    1628, 14
  1589,  1    1599,  6    1609,  5    1619,  3    1629,  2
In 1582, Year Calendar-2 is used up thru October 4th, when Pope Gregory XIII orders the next
10 days to be dropped immediately. Thus, October 15th becomes the first day after October 4th.
Year Calendar-6 is used from October 15th to the end of 1582.


B: Alternative Year Calendar Sequence, 1580-1629
    Observance of Leap Day February 29 omitted every four
    years from 1584 to 1620.
             
  1580, 13    1590,  3    1600,  6    1610,  2    1620,  5
  1581,  1    1591,  4    1601,  7    1611,  3    1621,  6
  1582,  2    1592,  5    1602,  1    1612,  4    1622,  7
  1583,  3    1593,  6    1603,  2    1613,  5    1623,  1
  1584,  4    1594,  7    1604,  3    1614,  6    1624,  9
  1585,  5    1595,  1    1605,  4    1615,  7    1625,  4
  1586,  6    1596,  2    1606,  5    1616,  1    1626,  5
  1587,  7    1597,  3    1607,  6    1617,  2    1627,  6
  1588,  1    1598,  4    1608,  7    1618,  3    1628, 14
  1589,  2    1599,  5    1609,  1    1619,  4    1629,  2
In Sequence B, no days are removed from 1582, and the observance of Leap Year and
February 29th is put aside in the period from 1584 to 1620.

Beginning 1621, Sequence B is equal with Sequence A above. Observance of February
29th is restored beginning 1624, and now the Gregorian Calendar is firmly in place.


C: Alternative Year Calendar Sequence, 1580-1629
    Transition from the Julian Calendar to the Gregorian
    Calendar in just ** THREE YEARS **.
              
  1580, 13    1590,  2    1600, 14    1610,  6    1620, 11
  1581,  1    1591,  3    1601,  2    1611,  7    1621,  6
  1582,  2    1592, 11    1602,  3    1612,  8    1622,  7
  1583,  3    1593,  6    1603,  4    1613,  3    1623,  1
  1584, **    1594,  7    1604, 12    1614,  4    1624,  9
  1585, **    1595,  1    1605,  7    1615,  5    1625,  4
  1586, **    1596,  9    1606,  1    1616, 13    1626,  5
  1587,  5    1597,  4    1607,  2    1617,  1    1627,  6
  1588, 13    1598,  5    1608, 10    1618,  2    1628, 14
  1589,  1    1599,  6    1609,  5    1619,  3    1629,  2
In Sequence C, no days are removed from 1582 or 1583.

In the years 1584, 1585 and 1586, the months of March, July and October have only
30 days each. Also, in 1584 Leap Year and February 29th are not observed.

During this three-year period, each year -- 1584, 1585 and 1586 -- has only 362 days.
On November 1st 1586, the desired reduction of 10 days in just three years would be achieved.
From this point onwards, the Gregorian Calendar System would now be firmly in place.

You can click-on each one of the three years (shown herein in blue underlined text)
and view the calendar used in the particular year.

BONUS ... The Split 3/2 Calendar alternative plan
Accomplishes the Julian-to-Gregorian transition in just nine years.


Frank's Humble Abode at frankosite2020.com .... formerly known as frankosport.com
The Perpetual Calendar: Was It Really Necessary To Drop Those 10 Days in 1582 ??




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