National day Day may be celebrated any day between 15 April and 15 May. Another example is Thailand which celebrates the birthday of the king on 28 July. This date will change on the accession of the heir to the throne. Most national days can be categorized in two large blocks: Denmark and the United Kingdom are among the few countries that do not have designated national days (though Constitution Day has many of the same features of a national day in Denmark's case). Importance attached to the national day as well as the degree to which it is celebrated vary greatly
National Day of Reason National Day of Reason as well. National Day of Reason The National Day of Reason is a secular celebration for humanists, atheists, and other secularists and freethinkers in response to the National Day of Prayer, a legal holiday in the United States. The day is celebrated on the first Thursday in May of every year, to coincide with the National Day of Prayer, which many atheist and secular groups view to be unconstitutional. The purpose of the National Day of Reason is to "celebrate reason—a concept all Americans can support—and to raise public awareness about the persistent threat to religious