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Educational materials for IPMAT and IIMB UG preparation
Suppose that the year 2008 starts with the day 'Monday'. The calendar for the year 2009 will be the same in the year:
For a year’s calendar to be the same, it must start on the same day and have the same leap year status.
2008 is a leap year with 366 days. Since 366 days = 52 weeks + 2 days, the next year (2009) will start 2 days later than 2008.
2008 starts on Monday
So, 2009 starts on Monday + 2 days = Wednesday
2009 (non-leap): starts Wednesday
2010 (non-leap): starts Wednesday + 1 day = Thursday
2011 (non-leap): starts Thursday + 1 day = Friday
2012 (leap): starts Friday + 1 day = Saturday
2013 (non-leap): starts Saturday + 2 days (because 2012 is leap) = Monday
2014 (non-leap): starts Monday + 1 day = Tuesday
2015 (non-leap): starts Tuesday + 1 day = Wednesday
Since 2015 starts on Wednesday like 2009 and both are non-leap years, their calendars will be the same.
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