don't know.
The Gregorian calender is the Christian calender, the one the west uses.
No. There is the Gregorian calendar (used by Americans, Europeans, and Japanese), a Hebrew calendar, and a Muslim calendar at least. Here's a link to a Chinese calendar and an Indian calendar.
Th lunar calendar is about 11 days shorter.
2008 was a leap year starting on Tuesday. The next time such a calendar can be used again is in 2036.
In the Hebrew calendar, the month of Av is followed by the month of Elul.
The 2007 calendar is current in 2018. The next time it will be current again is in 2029.
About 52. More precisely, the Gregorian calendar has 365.2425 days per year on average; divide that by 7, and you get the average length of the Gregorian year in weeks.
Gregorian chants are monophonic. Gergorian chants are no longer written as they were long ago.
You mean the "Gregorian" calendar. It was developed to replace the inaccurate Julian calendar by the Roman Catholic Church in 1582. I was quickly adopted by the Catholic Countries of Europe Although the rest of the world resisted at first (it was thought to be a Catholic plot by Protestants) it gradually became accepted as its greater accuracy became evident. For example, Britain, (then including the original 13 colonies of the what is now the United States) adopted it in 1752. Russia didn't adopt it until the year after the Communists came to power in 1917.
I think he didn't want singers to get to fancy with individual variations and distract from the purpose of the mass.
the Gregorian calendar
No, the 2012 calendar has its dates on the same days of the week at the 1984 calendar and the 2040 calendar. The 2000 calendar is likewise the same as the 1972 calendar and the 2028 calendar.
the Roman calendar
Lunar calendar
The Gregorian Calendar is solar and the Hebrew Calendar is lunisolar.
calendar
Nanakshahi Calendar.
The new calendar has pictures