Yes, October 1582 was the introduction of the Gregorian calendar, which is almost identical to its predecessor but 25 times more accurate.
The name of Caesar's calendar was the Julian calendar. It was replaced in 1582 by the Gregorian calendar, which we used today.
France wanted a secular calendar.
The Gregorian calendar, the most commonly used calendar today, was first introduced in October, 1582 as a reform of the Julian calendar, which had been in use since the fifth decade B.C. The start date (the year 1) was believed to be the year of the birth of Jesus of Nazareth, but that calculation has been known for centuries to be incorrect.
Ancient civilizations used different calendars. Greeks used the Olympiads (a four year cycle), parts of Europe in late antiquity used the indiction cycles etc. The modern calendar was introduced in 1582 by the pope Gregory XIII (Gregorian calendar).
The calendar that currently is applicable in the world it is called "Gregorian calendar" since Pope Gregory XIII introduced it on 24 February 1582, amending the existing Julian calendar at the time. The East Orthodox Church nations adopted the Gregorian calendar in February 15, 1923 adding 13 days on that date and the next day was March 1, 1923. It is the year that between February 16 and 28 there are no deaths/ births recorded by the Civil Register of the states involved.
Pope Gregor XIII introduced the calendar named after him (the Gregorian calendar) in 1582. However, some countries adopted this calendar as late as the 20th. Century.
Pope Gregory XIII revised the Julian calendar in 1582.
For the Catholic countries in Europe October 5th, 1582 didn't exist on their calendar. During October 1582, people in some parts of Europe changed their calendars from the Julian calendar to the Gregorian calendar. This was done under the recommendations made by Christopher Clavius, and ordered by Pope Gregory XIII. To stay consistent with the vernal equinox, the days between October 5th, 1582 and October 14th, 1582 were dropped.
The name of Caesar's calendar was the Julian calendar. It was replaced in 1582 by the Gregorian calendar, which we used today.
in 1582
In many countries, there was no October 10, 1582. That was the month that the Gregorian calendar was put into use for the first time, so in many places, the day after Thursday, October 4, 1582 Julian calendar was Friday, October 15, 1582 Gregorian calendar. Although it was not in use until five days later, October 10, 1582 is a Sunday on the Gregorian calendar. On the Julian calendar it is a Wednesday.
1582
The most widely used calendar in the world, adopted in 1582 to correct errors in the Julian calendar.
We changed from the Julian calendar to the Gregorian calendar because it was out of synch with the solar calendar. The Pope consulted an astronomer and it was decided to add leap years to correct the problems. Catholic countries changed in 1582. However Germany did not until 1700 and Great Britain waited until 1752. Russia did not change until 1918.
Julian
The calendar now almost universally in use is the Gregorian calendar introduced in 1582
The calendar you are referring to is the Julian calendar, which was introduced by Julius Caesar. The Gregorian calendar, introduced by Gregory XIII in 1582, shortened the day by 10 minutes and 48 seconds. It also dropped 10 days from the years 325 to 1582.