The year is different
the days of the week stay the same but the dates change
The year is different
he Roman calendar has the same months and month lengths as the Julian calendar, but inserts leap days according to a different rule
April & July for all year and Jan and Oct for non leap years
31 days. The number of days in October has remained the same since about 45BC.
No, calendar months are not the same across the world. While the Gregorian calendar is widely used, some regions may follow different calendar systems or have variations in how months are named or days are numbered. For example, some cultures have lunar calendars where months are based on the cycles of the moon.
Every woman is a little different in this matter, but the average is about 28 days. That's not quite one calendar month, so a woman's periods will generally NOT correspond with the same day of each 30- or 31-day calendar month.
It can be found in any Almanac. There is a calendar for every year, but there cannot be more than 14 different calendars - they merely repeat over and over. A universal calendar is keyed by numbers, with every year that matches that number. For example, you look up the calendar for 1973. It tells you it was calendar number "2" or which was the same calendar as 2001 and 2007. I collect calendars, and I have on the wall of my office right now, a drugstore calendar from 1956. It is the same dates for each month and day as 2012.
Not this year. Earth Day is the same date in the Gregorian calendar each year, and the Gregorian calendar is not synchronized with the lunar calendar at all.
1992 was a leap year, so the exact same calendar does not come up for 28 each years. In this century the years that will be the same as 1992 will be 2020, 2048 and 2076.
different time lines
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.
At the time of the revolution, the Russian Empire still was using the ancient Julian calendar, which had been discarded some 150 years earlier by most Western countries. The result was that each day in Russia was dated 13 days earlier than the same day in the West. According to the old calendar, the date of the Bolshevik revolution was October 25. But according to the new Gregorian calendar, the date actually was November 7. Only after the Bolsheviks established the Soviet Union did the country adopt the new calendar. So it was the Bolsheviks themselves who were responsible for changing the date of their October Revolution of October 25 to the national celebration November 7.