Hi Opal,
Below i explain the last day of the Julian Calendar in Rome.
The last day of the Julian Calendar in Rome was 4th October 1582, the next day was 15th October 1582, as they had to correct the error of the Julian Calendar, so took ten days out, so they don't exist.
They used midnight day marker that i will explain further later, so the last minute of the Julian Calendar is 23:59pm on 4th October 1582 in Rome by Pope Gregory XIII, who used Sirius in saluting the end of the great Julian Calendar:-
en.wikipedia.org...
Astronomy graph below shows Sirius rising along horizon in Rome on 4th October 1582 at 23:59pm, i can not show midnight on 5th October as it does not exist:-
Below i explain the last day of the Julian Calendar in Rome.
The last day of the Julian Calendar in Rome was 4th October 1582, the next day was 15th October 1582, as they had to correct the error of the Julian Calendar, so took ten days out, so they don't exist.
They used midnight day marker that i will explain further later, so the last minute of the Julian Calendar is 23:59pm on 4th October 1582 in Rome by Pope Gregory XIII, who used Sirius in saluting the end of the great Julian Calendar:-
en.wikipedia.org...
Astronomy graph below shows Sirius rising along horizon in Rome on 4th October 1582 at 23:59pm, i can not show midnight on 5th October as it does not exist:-