The issues in this case concern the constitutional validity of Maryland criminal statutes,[1] commonly known as Sunday Closing Laws or Sunday Blue Laws. These statutes, with exceptions to be noted hereafter, generally proscribe all labor, business and other commercial activities on Sunday. The questions presented are whether the classifications within the statutes bring about a denial of equal protection of the law, whether the laws are so vague as to fail to give reasonable notice of the forbidden conduct and therefore violate due process, and whether the statutes are laws respecting an establishment of religion or prohibiting the free exercise thereof.

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