It depends which country you are referring to.
spring break starts on March 29 and returning to school on April 6
Blud Cold - 2011 The Peterson's Vacation 1-1 was released on: USA: 7 April 2011
April 18th to the 26th
Anonymous - 2011 II was released on: USA: 30 April 2011 (Lovett School High School Film Fest) USA: 30 April 2011 (Santa Monica Teen Film Festival)
Waverley school says school is open on Wednesday 27th April 2011
Hawaiian Vacation - 2011 was released on: Canada: 8 April 2011 (Sprockets Toronto International Film Festival for Children) USA: 22 May 2011 (Seattle International Film Festival) USA: 24 June 2011 Portugal: 7 July 2011 France: 27 July 2011 Japan: 30 July 2011
for spring is April 28
Signal - 2011 was released on: USA: 16 April 2011 (UNC School of the Arts)
No Vacation - 2011 was released on: USA: 28 February 2011 (internet)
Hillaree the Hillbilly - 2011 The High School 1-9 was released on: USA: 27 April 2011
Rachael Ray's Tasty Travels - 2005 Rachael's Vacation Barcelona was released on: USA: 29 April 2011
Spring break is a small vacation that is given to students in the second half of the school year. The date vary by school and state and usually occur in March and April.