Convention mainly. The calendar in a form as we know it was not introduced until many years after the death of christ. The calculations for that incident were incorrect.
You can purchase a new 2013 calendar in WHSmith shops. You can get a free 2013 calendar by visiting the "Year Planner Calendar" website which has free year planners and calendars for many years.
2002 was the last time the calendar was the same as in 2013.
The calendar for 2009 was the same as 2015
2013
Oh, dude, you're asking about calendar stuff now? Like, who even knows that off the top of their head? But hey, if you're curious, the next year with the same calendar as 2009 is 2020. So, like, mark your calendars or something.
Calendars do actually repeat in a certain pattern. If the year is not a leap year, then the calendar will repeat in 11 years, so a 2009 calendar would again be usable in the year 2020.
No, there was no Canadian GP in the year 2009. The event did not happen because Canada was not part of the F1 racing calendar in the year 2009. However it was back in the calendar in the year 2010.
Either 52 or 53 mondays are there in a calendar year. 2009 has 52 mondays.
1981
52
The Chinese calendar is a lunisolar calendar, incorporating elements of a lunar calendar with those of a solar calendar. A year in the Chinese calendar starts on the second new moon after the winter solstice, unless an intercalary month moves it to the third moon. The current year (February 10, 2013, 2013-January 30, 2014) is Guisi-year (year of the Snake).
The calendar for the year 1987 will repeat exactly in the year 2018. This is because the Gregorian calendar repeats every 28 years. The calendar for any specific year will repeat in the year that is a multiple of 28 years later.