The National Day is a designated date on which celebrations mark the nationhood of a nation or non-sovereign country.
A nation is a large group or collective of people with common characteristics attributed to them — including language, traditions, mores, habitus, and ethnicity.
Military parade in Madrid on National Day by RT
This nationhood can be symbolized by the date of independence, of becoming a republic or a significant date for a patron saint or a ruler.
A patron saint, patroness saint, patron hallow or heavenly protector is a saint who in Roman Catholicism and Eastern Orthodoxy is regarded as the heavenly advocate of a nation, place, craft, activity, class, clan, family or person.
Independence is a condition of a nation, country, or state in which its residents and population, or some portion thereof, exercise self-government, and usually sovereignty, over the territory.
National Memorial Day Parade by DoD News
This signals the use of a "class" of National Days, that are equally important in the foundation of the nation, and a "class" of less important official public holidays.
An example is Jamaica, which up to 1997 celebrated its National Day on the first Monday in August.
Jamaica is an island country situated in the Caribbean Sea, consisting of the third-largest island of the Greater Antilles.
This commemorated independence from the United Kingdom which was attained on Monday, 6 August 1962, the first Monday in August of that year.
The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom or Britain, is a sovereign country in western Europe.
Israel's Independence Day is not fixed relative to the civil Gregorian calendar, being formally linked to 5 Iyar on the Jewish calendar, but may also be moved to any day between 3 and 6 Iyar in order to avoid preparing for or celebrating either Independence Day or Memorial Day on Shabbat; the practical effect of this is that Independence Day may be celebrated any day between 15 April and 15 May.
Shabbat or Shabbos or the Sabbath is Judaism's day of rest and seventh day of the week, on which religious Jews and certain Christians remember the Biblical creation of the heavens and the earth in six days and the Exodus of the Hebrews, and look forward to a future Messianic Age.
Israel, officially known as the State of Israel, is a country in the Middle East, on the southeastern shore of the Mediterranean Sea and the northern shore of the Red Sea.
Iyar is the eighth month of the civil year and the second month of the ecclesiastical year on the Hebrew calendar.
Another example is Thailand which celebrates the birthday of the king on 5 December.
Thailand, officially the Kingdom of Thailand, formerly known as Siam, is a country at the centre of the Indochinese peninsula in Southeast Asia.
This date will change on the accession of the heir to the throne.
Most national days can be categorized in two large blocks:
Newer countries that celebrate their national day as the day of their independence.
Older countries that use some other event of special significance as their national day.
Denmark and the United Kingdom are among the few countries that do not have designated national days.