No.
It is entirely up to the individual school districts. It differs from state to state, even from town to town. Generally, however, spring break is sometime in March or April.
In the spring
it starts on the 22nd
Dallas/Fort Worth schools are out March 14-18, 2011, for Spring Break.
It varies
It depends on where you live. Most places in the Central US have already had Spring Break.
March 13-20, 2011: Spring Break (holiday, all UNM offices closed)
april 12
Spring break 2009
No. Spring starts in March in the US.
March 14 to 18 depends on which week your state/school appoints this Spring Break to start and end at :)