48 days.
342 days.
April 2010 is of course now passed. The original question was asked on the 26th of March 2010. The answer at that point was 6 days.
April in 2011 had 30 days.
Including the start and end dates in the calculation, there are 29 days between the two dates.
The 5th of March 2010 is 210 days before it and the 29th of April 2011 is 210 days after it.
March has 31 days and April has 30 days, giving a total of 61 days.
Including the start and end dates in the calculation, there are 22 days between the two dates.
Including the start and end dates in the calculation, there are 46 days between the two dates.
28th of January 2013 is 330 days after it and the 9th of April 2011 is 330 days before it.
The 15th of February 2012 is 330 days after and the 27th of April 2011 is 330 days before.
From 14 March to 21 April is 38 days, so there are 37 days between 14 March and 21 April.
The total number of days between Friday, April 15th, 2011, and Monday, March 26th, 2012, was 346 days.