The Gregorian calendar is used throughout most of the world.
Gregorian.
The Sumariens created the calendar that we use today.
No. The mayans made the calendar and this calendar is what we use today.
The Mr gazzi calendar
I can't see "this" calendar.
It is the Gregorian calendar which we use today
the amans use a christian calendar.
Yes they use a standard calendar.
Gregorian
The calendar we use today was made by the Romans under Julius Caesar, thus, it is called the Julian calendar.
If you mean 365.25 days in a year then it was the Romans who introduced the calendar that we now use today.
The Gregorian calendar is the most widely used calendar system in the world today. It was introduced by Pope Gregory XIII in 1582 as a reform of the Julian calendar.
The Julian calendar that is in use in the west is standard world wide. While most Asian and Oriental cultures do have their own calendars, most of them use the Julian calendar for business use.