the Gregorian calendar
Julius Caesar created the modern calendar in 46 BC, and it was adopted by Rome in 45 BC.His Julian Calendar of 365.25 days added winter months that were previously inconsistent, and used leap days to keep the seasons and the calendar in alignment.The current form is also called the Gregorian Calendarfor Pope Gregory XIII, who in October 1582 introduced the adjustment of the Julian calendar by skipping 10 calendar days, recognizing that the year was actually slightly shorter than 365.25 days. This calendar removes the leap days from end-of-century years (e.g. 1800, 1900) unless the first 2 digits are evenly divisible by 4.
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.
It is the Gregorian calendar.
The 2007 calendar is current in 2018. The next time it will be current again is in 2029.
Julian
Great Britain began using the current calendar in 1752.
The Ancient Mayan Civilization calendar.
The First Roman calendar was the Romulean calendar, established by Romulus, the first king of Rome, when he founded Rome in 753 BC. It only had 10 months. The second calendar, the calendar of Numa, was established soon afterwards by the second king of Rome, Numa Pompilius. It had 12 months. Both these calendars were lunar. The Julian calendar was established by the Julius Caesar in 45 BC. He switched from a lunar to a solar calendar. Apart from some minor modifications introduced by Pope Gregory XIII in the 15th century AD, this is the calendar we still use today.
2022.
The difference is the accuracy of mathematical computation of the length of the day, in essence. The Roman calendar was fairly accurate (considering the computation tools of the time, quite accurate), but over a period of many years, it was off by a period of (then) ten days. The Gregorian calendar proposal used more precise mathematics, and deduced that the calendar had lost ten days since the calendar of Rome was established. The calendar was jumped forward ten days (it's a long story). The current (Gregorian) calendar is accurate to about one day every several thousand years.
2066
Juche 98
A lunar calendar is based on the movements of the Moon. It is a general description of a type of calendar. There are many lunar calendars. The Gregorian Calendar is one particular calendar. It was established by Pope Gregory XIII, who introduced it in 1582. It is the calendar that much of the world now uses.
The 2003 calendar matches the 2014 calendar, including the date of Easter and the dates associated with it (Mardi Gras through Pentecost Sunday).
There are 365 days in earth's year as well as the current calendar.