The Julian calendar was introduced by Julius Caesar in 45 BC.
In the Julian calendar, the tropical year is approximated as 365 1/4 days = 365.25 days. This gives an error of 1 day in approximately 128 years. The approximation 365 1/4 is achieved by having 1 leap year every 4 years. It was in common use until the 1500s, when countries started changing to the more precise Gregorian calendar, which has more complex rules for which years are leap years. However, some countries (for example, Greece and Russia) used the Julian calender well into the 1900s, and the Orthodox church in Russia still uses it, as do some other Orthodox churches. As a result those churches celebrate several religious holidays later then non-Orthodox churches.
A Julian date, which is presented as simply a number, is the number of days that have elapsed on the Julian calendar and the proleptic Julian calendar (meaning the application of the Julian calendar to a period before its introduction in 46 BCE) since 12 noon on Monday the 1st of January 4713 BCE.
The name of Caesar's calendar was the Julian calendar. It was replaced in 1582 by the Gregorian calendar, which we used today.
The months of the Julian calendar are the months we use today. We use the Gregorian calendar, which is a slightly modified version of the Julian calendar. The month July is named after Julius Caesar. August is named after Augustus.
Julian
12
The Roman Empire started using the Julian calendar in the 1st century BC, and England and its colonies continued to use it until September, 1752.
The name of Caesar's calendar was the Julian calendar. It was replaced in 1582 by the Gregorian calendar, which we used today.
The Julian Calendar was initiated by Julius Ceaser in 45B.C.
The Julian Calendar is named for Julius Caeser.
the Roman calendar
2012 in the Julian calendar is a leap year that begins on a Saturday and ends on a Sunday. 1 Jan 2012 in the Julian calendar is 14 Jan 2012 in the Gregorian calendar.
the Gregorian calendar
The Julian calendar begins on January 1st. next January 1st will be 1001.
Not a country, but Foula still uses the Julian calendar
The civil version of the Julian calendar is based on the su, and so it is solar. However, the Julian calendar includes an undated lunar calendar that allows it to calculate when Easter is, so it is lunisolar.
he Roman calendar has the same months and month lengths as the Julian calendar, but inserts leap days according to a different rule
The Julian calendar is 13 days behind the Gregorian calendar from March 1900 until March 2100.
Our calendar is the Gregorian Calendar. It is named after Pope Gregory XIII who took 11 minutes of the day of the Julian calendar and made some other minor modifications in 1582. This means that our calendar is a slightly modified version of the Julian Calendar.