In a regular year, adding 90 days to January 28 gives April 28.
In a leap year, adding 90 days to January 28 gives April 27.
Adding 90 days to January 28, 2011 gives April 28, 2011.
January 26th
Adding 90 days to January 11, 2009 gives April 11, 2009.
Adding 90 days to January 27, 2012 gives April 26, 2012.
90 days after Friday, January 22, 2010, = Thursday, April 22, 2010.
In a non-leap year, adding 90 days to January 13 gives April 13. In a leap year, adding 90 days to January 13 gives April 12.
90 days after May 30, will be August 28 on a 2010 calendar.
March 27, 2012
The 22nd of April 2009.
January 21 1011
Adding 90 days to October 20, 2010 gives January 18, 2011.
Subtracting 90 days from April 8 on a non-leap year gives January 8. Subtracting 90 days from April 8 on a leap year gives January 9.