Not to worry -- the original article is still there. Here's their correction.
http://www.dailynews.com/news/ci_3751434
For the record
Due to an editing error, a story Tuesday incorrectly identified May 1 as Labor Day. In fact, Labor Day is the first Monday in September.
Due to an editing idiot error, a story Tuesday incorrectly identified May 1 as Labor Day. In fact, Labor Day is the first Monday in September.