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.
The calendar was technically first invented by the Ancient Egyptians.
april what punjabi month
2004
Historians do not know who or when mankind invented the first calendar, probably early man when he first carved a notch into a stick or a bone which marked the passing of each full moon. Notched bones used to record moon phases have been found in Africa and Europe dating back to about 20,500 BC. There are many different calendars invented by different cultures to suit their needs. The mayans created a calender, but I believe the calendar we use is based off of the Romans. Some also believe that the Sumerians invented the 12-month calendar.
The Gregorian calendar was named after Pope Gregory XIII, who introduced it in October 1582 as a reform to the Julian calendar. The reform was implemented to correct inaccuracies in the Julian calendar's calculation of leap years, which had led to a misalignment with the solar year. The Gregorian calendar is now the most widely used calendar system in the world, with some adjustments made over time to further refine its accuracy.
George Washington invented the lunar calendar
The name of the person that invented the first calendar is not known. The first calendar was invented in Scotland.
1954 calander Urdu & english
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The Egyptian
Rome
The calendar was technically first invented by the Ancient Egyptians.
1995
what will be 11th Poush 1378 from Bengali to English Calendar
The Tamil calendar year 1106 corresponds to the English calendar year 2027.
I t was invented around 4231 B.C.
The Romans invented it in 46 ad.