The filing deadline for 2014 tax returns has been extended from April 30, 2015 to May 5, 2015. The CRA released a communication in error on April 24, 2015 referring to the May 5 deadline. To avoid any confusion, the CRA has confirmed that tax returns filed by midnight on May 5, 2015 will not incur any interest or penalties.

http://www.cra-arc.gc.ca/gncy/t1gtrdy/menu-eng.html