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June 2020
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1582
.
1582
(
MDLXXXII
)
was a
common year starting on Monday
of the
Julian calendar
, the 1582nd year of the
Common Era
(CE) and
Anno Domini
(AD) designations, the 582nd year of the
2nd millennium
, the 82nd year of the
16th century
, and the 3rd year of the
1580s
decade. As of the start of 1582, the Gregorian calendar was
10 days ahead of the Julian calendar, which had previously been the universally accepted calendar in Christian nations. However, this year saw the beginning of the
Gregorian Calendar switch
, when the
Papal bull
known as
Inter gravissimas
introduced the
Gregorian calendar
, adopted by Spain, Portugal, the
Polish?Lithuanian Commonwealth
and most of present-day Italy from the start. In these countries, the year continued as normal until Thursday,
October 4
. However, the next day became Friday,
October 15
(like a
common year starting on Friday
), in those countries (France followed two months later, letting Sunday,
December 9
be followed by Monday,
December 20
). Other countries continued using the Julian calendar for decades or, in some cases, centuries.