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Several nations observe or have observed a Navy Day to recognize their navy.
Until 2015 and since 2018, the day also marked the opening of the ordinary Parliamentary season (through September 18, Independence Day) and is the traditional day for the President's State of the Nation address.
The Day of the Croatian Navy is celebrated on September 18.
Navy day in India is celebrated on 4 December every year to celebrate the achievements and role of the naval force to the country and to give respect to our naval force.
In Israel, Navy Day (יום חיל הים) is celebrated on June 30. At this time in 1948 the Port of Haifa was captured by Israel during the 1948 Israeli War of Independence. Traditionally, Navy Day is preceded by Memorial Evening.
Memorial Evening was rescheduled as well, marking the loss of destroyer INS Eilat on 21/10/1967. As of 2009 the celebrations have been elongated for a week, which for practical reasons, are held each year in August.
In The Netherlands the navy days ("vlootdagen") are held on the first weekend of July, with major events organized by the Royal Netherlands Navy.
In Pakistan, Navy Day (Urdu: یوم بحریہ), is celebrated on September 8 in commemoration of the Indo-Pakistan war of 1965. September 8, 1965 was the day when Pakistan Navy launched its successful strategic operation against India, codename Operation Dwarka, by the 25th Destroyer Squadron.
In Romania, Navy Day takes place on August 15.
In Russia Navy Day is a national holiday that normally takes place on the last Sunday of July. It is a legacy of the Soviet Union that introduced this holiday in June 1939; the date was chosen in connection with the Battle of Gangut.
In Turkey, Navy Day is celebrated on September 27. It commemorates the Battle of Preveza on 27 September 1538 near Preveza in northwestern Greece between an Ottoman fleet and that of a Christian alliance assembled by Pope Paul III in which the Ottoman fleet defeated the allies. It is not a national holiday.
In Ukraine Navy Day is a professional holidays that is celebrated on every first Sunday of July. The commemoration was established in 1996 (then to be celebrated August 1). Till 2012 the day was celebrated on August 1. From 2012 till 2015 Ukraine had the same date for its Navy Day as Russia and the Soviet Union (like Russia, Ukraine is a former Soviet republic); the Soviet Union introduced its Navy Day in June 1939; the date was chosen because of a connection with the day the Battle of Gangut took place. On 24 August 2014 Ukrainian President Petro Poroshenko speeched that Ukraine should not celebrate the holidays of the "military-historical calendar of Russia" but "We will honor the defenders of our homeland, not someone else's". On 12 June 2015 a Presidential decree by Poroshenko moved Ukraine's Navy Day to every first Sunday of July.
The term is also used in Britain to mean an open day at a dockyard such as HMNB Portsmouth, when the public can visit military ships and see air displays, roughly along the lines of an American Fleet Week. The Royal Navy's equivalent of "Navy Day" is Trafalgar Day, which is celebrated on 21 October.
In the United States, the Navy League of the United States organized the first Navy Day in 1922, holding it on October 27 because it was the birthday of 26th President Theodore Roosevelt (1858–1919, served 1901–1909), who was a naval enthusiast/promoter of sea power and former assistant Secretary of the Navy just before the Spanish–American War of 1898. Although meeting with mixed reviews the first year, in 1923 over 50 major cities participated, and the United States Navy sent a number of its ships to various port cities for the occasion. The 1945 Navy Day was an especially large celebration, with 33rd President Harry S. Truman (1884–1972, served 1945–1953), reviewing the returning home American fleet in New York Harbor after victory in World War II.
In 1949, Louis A. Johnson, (1891–1966, served 1949–1950), second Secretary of the newly merged and created Department of Defense, directed that the U.S. Navy's participation occur on newly established Armed Forces Day for the unified/coordinated uniformed services in May, although as a private civilian organization, the Navy League was not affected by this directive, and continued to organize separate Navy Day celebrations as before. In the 1970s, historical research found that the "birthday" of the earlier Continental Navy during the American Revolutionary War (1775–1783), was determined to be October 13, 1775, and so Chief of Naval Operations Admiral Elmo R. Zumwalt worked with the Navy League to define October 13th as the new date of Navy Day. However, Navy Day in the United States is still largely recognized as October 27th.
July 24, the birthday of Simon Bolivar and the anniversary of the 1823 Patriot victory in the Battle of Lake Maracaibo, is marked as Navy Day in both Venezuela and Colombia. Both the Bolivarian Navy of Venezuela and the Colombian Navy hold major events to mark the holiday.