Samuel,
Note that the Julian calendar was implemented in 45 BC in the Proleptic
Gregorian Calendar and named after Julius Caesar.
The Proleptic Gregorian Calendar has no year zero. The Year 1/BC is the
preceding year of 1/AD. The Year 1/BC is the end of a Gregorian
Calendar 400 year cycle and is a leap year.
The Julian calendar also had no zero year and is also Proleptic. Some
of the Eastern Orthodox churches still use the Julian calendar.
Steven J. Hathaway
On 4/14/2012 11:10 AM, Samuel Medeiros wrote:
Steven,
thank you for this reference.
I understood the Proleptic Gregorian Calendar is used to dates before
1582, when the Gregorian Calendar effectively was used.
As the Julian Calendar had a big error (by considering all centuries
as leaps), there are difference to consider between Gregorian and
Julian dates before that year (1582).
Sincerely,
Samuel Queiroz
Em 12 de abril de 2012 20:16, <shath...@e-z.net
<mailto:shath...@e-z.net>> escreveu:
Samuel,
The year BC-1 is the year before AD-1.
See: http://wikipedia.org/wiki/Proleptic_Gregorian_calendar
This gives you some insight if we are going to use Gregorian Calendar
years before AD-1.
Sincerely,
Steven J. Hathaway
--
Samuel de Medeiros Queiroz
Formal Methods Group (GMF - UFCG - Brazil)
