Sacred Heart, Island Park

There are two parishes in Nassau County named Sacred Heart.  This one, in Island Park, is the older one, being established in 1938.  Its address is 282 Long Beach Road, Island Park NY 11558, telephone 516-432-0655.  Its website is linked here.
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Regarding the Mass schedule: The same schedule was seen here in May, 2015.

The tent may signal preparation for the annual feast of San Gennaro.

Across Long Beach Road is the parish center.

The N15 bus provides frequent service on this street, connecting Roosevelt Field, Mineola, and Hempstead with Long Beach.  The above three photos were taken in 2011.
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In May, 2015, I visited the church after the Tuesday morning Mass. This was still the Easter season.  I wonder whether the celebration of the Resurrection is there all year long, as its reality endures.

Five Towns deanery

In the diocese of Rockville Centre, the Five Towns Deanery includes nine parishes, that is, more of southwest Nassau County than the fabled "Five Towns," Hewlett, Woodmere, Cedarhurst, Lawrence, and Inwood. In order of establishment these parishes are:
1872 - St. Joseph, Hewlett.  The April 13, 2011, Long Island Catholic includes an important article, "Five Towns parishes to enter new era for collaboration."  The bishop announced plans for the pastor of St. Joseph parish to become in the future also the administrator of St. Joachim and Our Lady of Good Counsel.  Three parishes will remain, but the priest(s) will live in one.  The article did not tell the number of Catholics enrolled in each parish.  None of the three has a school. 
1894 - St. Joachim, Cedarhurst
1909 - St. Raymond of Penyafort, East Rockaway
1910 - Our Lady of Good Counsel, Inwood.  See also this article in Five Towns Patch about the centennial.  About twenty photos are linked here.
1915 - St. Mary of the Isle, Long Beach
1926 - St. Ignatius Martyr, Long Beach
1927 - St. Anthony, Oceanside
1937 - Our Lady of the Miraculous Medal, Point Lookout
1938 - Sacred Heart, Island Park
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The above nine parishes comprise the Five Towns deanery, which has two Catholic elementary schools.  St. Raymond's has a parish school, and the three parishes of Long Beach and Point Lookout sponsor Long Beach Catholic Regional School at St. Ignatius Martyr.