physics

Navy Day

Navy Day is a physics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Navy Day rather than just read about it. In short: Several nations observe or have observed a Navy Day to recognize their navy. By country Argentina The Argentine Navy day is celebrated on May 17, anniversary of the victory achieved in 1814 against the Spanish fleet in the Battle of Montevideo.

Key takeaways

Navy Day belongs to physics; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Navy Day to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Navy Day from memory before moving on to harder problems.

Reference excerpt

Several nations observe or have observed a Navy Day to recognize their navy.

By country

Argentina The Argentine Navy day is celebrated on May 17, anniversary of the victory achieved in 1814 against the Spanish fleet in the Battle of Montevideo.

Bahrain The Royal Bahrain Naval Force Day is celebrated on February 18.

Bangladesh The Bangladesh Navy Day is celebrated on March 26, in anniversary the Independence Day of Bangladesh, the day in which Bangladesh Navy first came into existence.

Bulgaria Bulgaria's Navy Day is celebrated on the second Sunday in August.

Chile

The Día de las Glorias Navales is a public holiday in Chile on May 21. It commemorates the Battle of Iquique on May 21, 1879, in the War of the Pacific. 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. Principal civic acts are performed in Santiago de Chile, Iquique and Valparaíso, where the Chilean Navy Headquarters are located, as well as in Punta Arenas, Puerto Montt, Arica and Talcahuano.

China The People's Liberation Army of China celebrates the founding of its naval arm on "Navy Day", 23 April.

Croatia The Day of the Croatian Navy is celebrated on September 18.

Ecuador Navy Day (Día de la Armada Nacional) is celebrated on July 25, in commemoration of the Battle of Jambelí (July 25, 1941), part of the Ecuadorian–Peruvian War.

India

Navy day in India is celebrated on 4 December every year to celebrate the achievements and role of its naval force. It commemorates the day when Indian Naval Ships set Karachi ablaze and gave a successful completion of Operation Trident.

Iran November 28 is a Navy Day in Iran. It commemorates Operation Morvarid of 1980, a major Iranian Navy victory during the Iran–Iraq War.

Israel

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 Arab–Israeli War. Traditionally, Navy Day is preceded by Memorial Evening. In 1993 Admiral Ami Ayalon decided to hold the Israel Navy day in the last week of October, commemorating victories in several wars:

The sinking of the Egyptian Navy flagship El Amir Farouq on 22 October 1948. Capture of the Egyptian frigate Ibrahim el Awal on 31 October 1956. The overwhelming successful actions of the Yom Kippur War, 6–24 October 1973. 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. Another significance of June 30 Navy Day 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 which took place on 27 JulyJul./ 7 August 1714Greg.. This date is celebrated by a number of Soviet Jews who immigrated to Israel in 1990s.

Italy In Italy, Navy Day is June 10 and it is not a national holiday. It commemorates the sinking of the Austro-Hungarian dreadnought SMS Szent István by the Italian torpedo boat MAS-15 on June 10, 1918.

Japan

In the Empire of Japan, Navy Anniversary Day (海軍記念日, Kaigun Kinen'bi) was May 27 from 1906 until 1945. It was in commemoration of the Battle of Tsushima.

Mexico In Mexico, the Mexican Navy celebrates Navy Day on November 23, in honor of the 1825 Spanish surrender to naval ships stationed at San Juan de Ulúa. June 1 is National Maritime (Merchant Marine) Day, in honor of the Tabasco, the first ship crewed exclusively by Mexican-born sailors (1917) and the Potrero del Llano and Faja de Oro, Mexican oil tankers sunk on May 13 and 20, 1942, during World War II.

Netherlands In The Netherlands the navy days ("vlootdagen") are held on the first weekend of July, with major events organized by the Royal Netherlands Navy.

Peru In Peru, Navy Day is a national holiday celebrated on 8 October in commemoration of the Battle of Angamos in 1879 and the anniversary of Peruvian Navy creation in 1821.

Pakistan

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 merely successful strategic operation against India, codename Operation Dwarka, by the 25th Destroyer Squadron.

Portugal In Portugal, since 1998, Navy Day is celebrated on May 20, in remembrance of Vasco da Gama's first arrival in India.

Romania In Romania, Navy Day takes place on August 15.

Russia

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.

Taiwan (ROC) In Taiwan, Navy Day is celebrated on September 2. It commemorates the September 2 Naval Battle in 1958 during the Second Taiwan Strait Crisis.

Thailand In Thailand, Royal Thai Navy Day is celebrated on November 20. The day commemorates the day in 1906 that King Chulalongkorn opened the Royal Thai Naval Academy.

Turkey 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.

Turkmenistan

In Turkmenistan, Navy Day is celebrated on October 9 and celebrates the founding of the Turkmen Naval Forces in 1992.

Ukraine

… excerpt ends here. Continue reading the full article.

Illustrations

Navy Day: Japanese "Shining Navy Anniversary Day" official poster, 1942 — Japanese "Shining Navy Anniversary Day" official poster, 1942

Worked examples

Example 1 — a first encounter with Navy Day

Start with the simplest possible case. Write down what Navy Day claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Navy Day before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Navy Day ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Navy Day

In research: Navy Day appears in physics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Navy Day in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Navy Day is common in secondary-school and first-year university syllabi. It links to neighbouring topics Armed Forces days, Lists of observances, Maritime culture, so understanding it makes those chapters shorter.
In everyday life: Look for Navy Day outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Navy Day in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Navy Day means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Navy Day out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Navy Day in simple terms?

Several nations observe or have observed a Navy Day to recognize their navy. By country Argentina The Argentine Navy day is celebrated on May 17, anniversary of the victory achieved in 1814 against the Spanish fleet in the Battle of Montevideo.

Why does Navy Day matter?

Because it connects several physics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Navy Day?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Navy Day.