First of all there is no such thing as the American calendar.
The calendar used throughout the world for business and commerce is the Gregorian calendar.
All calendars go through various stages of evolution as refinements were made over time. As nations conquer nations and get assimilated then the dominant and usually the most accurate become the one used for commerce. Though others may be kept for religious and other reasons.
There was never an overall Gallic calendar as the Gallic people were widespread and had various beliefs. Mostly they would have relied on the calandar the Romans used.
the Gregorian calendar
astronomyNoVa nEt: astronomy
Two of the most famous Gauls who led armies against the Romans were Brennus and Vercingetorix. There are other minor leaders noted in Caesar's writing of the Gallic wars.Two of the most famous Gauls who led armies against the Romans were Brennus and Vercingetorix. There are other minor leaders noted in Caesar's writing of the Gallic wars.Two of the most famous Gauls who led armies against the Romans were Brennus and Vercingetorix. There are other minor leaders noted in Caesar's writing of the Gallic wars.Two of the most famous Gauls who led armies against the Romans were Brennus and Vercingetorix. There are other minor leaders noted in Caesar's writing of the Gallic wars.Two of the most famous Gauls who led armies against the Romans were Brennus and Vercingetorix. There are other minor leaders noted in Caesar's writing of the Gallic wars.Two of the most famous Gauls who led armies against the Romans were Brennus and Vercingetorix. There are other minor leaders noted in Caesar's writing of the Gallic wars.Two of the most famous Gauls who led armies against the Romans were Brennus and Vercingetorix. There are other minor leaders noted in Caesar's writing of the Gallic wars.Two of the most famous Gauls who led armies against the Romans were Brennus and Vercingetorix. There are other minor leaders noted in Caesar's writing of the Gallic wars.Two of the most famous Gauls who led armies against the Romans were Brennus and Vercingetorix. There are other minor leaders noted in Caesar's writing of the Gallic wars.
The Gregorian calendar was an adaptation of a calendar proposed by Aloysius Lilius in 1582. However, the calendar is named after Pope Gregory XIII who introduced this calendar by a papal bull. It was a reform to the Julian calendar.
Properly speaking, there is no "English" calendar system. You probably mean the predominant Western Calendar (also called the Christian Calendar). This calendar system is best called the "Gregorian Calendar", after Pope Gregory XIII who introduced the calendar system in 1582.
they are diffrent
The calendar is the same though the seasons differ.
Th lunar calendar is about 11 days shorter.
The primary difference is in how they count years. They base their years on the reign of an emperor rather than the method of defining them by the Christian calendar.
Gallic Empire ended in 274.
Gallic Empire was created in 260.
Gallic Wars happened in -51.
All of them
A lunar calendar is a calendar based on the phases of the moon as opposed to one determined by the Sun, known as the solar calendar. The lunar calendar varies from different regions. For example, the Hindu calendar starts their first day of the month on a different day than to the Chinese calendar.
Yes it is possible to use tannic acid in place of gallic acid for calculation of gallic acid equivalents.
Vercingetorix
Victoria - Gallic Empire - died in 271.