Holidays Calendar for September 17, 2025
National Heroes' Day is one of the public holidays in Angola. It is celebrated on September 17 to commemorate the birthday of Agostinho Neto, a prominent leader in the Angolan War of Independence and the first President of Angola.
On September 17, Tongans celebrate the birthday of Crown Prince Tupoutoʻa ʻUlukalala. It is one of the country's official public holidays.
National Unity Day is a public holiday celebrated in Belarus on September 17. It was established by Alexander Lukashenko in 2021 to commemorate the Soviet invasion of Poland, which resulted in the reunification of Western Belarus with the Byelorussian Soviet Socialist Republic.
International Country Music Day is observed annually on September 17. It was created to celebrate one of the most popular genres of music in the United States and arguably in some other parts of the world.
Rescuer's Day is an official professional holiday in Ukraine celebrated every year on September 17. On this day, all the employees of the State Emergency Service of Ukraine receive congratulations and appreciation for their work.
Every year teachers of Honduras celebrate Teachers' Day on September 17. This is a very important holiday, and students prepare special activities and greeting cards for their teachers to express their gratitude.
National Transportation Day (Hari Perhubungan Nasional, also translated as National Transport Day) is observed in Indonesia on September 17. It was established in 1971 by the then minister of transportation Frans Seda.
Human Resource Manager Day is an unofficial professional holiday celebrated in Russia and some other countries on the third Wednesday in September each year. Despite not having an official status, it is quite popular in the professional community.
National Pet Bird Day was created to celebrate the joy that is pet birds and to promote responsible bird ownership. It is observed annually on September 17.
On September 17, on the eve of Independence Day, Chile celebrates National Huaso Day. This holiday is dedicated to Chilean horsemen, shepherds and farmers who are considered an important part of Chilean folk culture.
Red Cross Day (Hari Palang Merah) in Indonesia is observed annually on September 17. It commemorates the formation of the Executive Board of the Indonesian Red Cross Society on this day in 1945.
Australian Citizenship Day is observed annually on September 17. It was introduced by the Australian Government in 2001. This day is an opportunity for all Australians to celebrate their citizenship and reflect on its importance.
Constitution Day (also referred to as Citizenship Day) is a United States federal observance that commemorates the signing of the U.S. Constitution and honors those who have become U.S. citizens by coming of age or naturalization. It is observed annually on September 17.
Anniversaries and Memorial Days →
Netherlands
Operation Market Garden Anniversary in the Netherlands
September 17 is the anniversary of Operation Market Garden. Although it is not an official remembrance day in the Netherlands, special memorial ceremonies are held across the country to commemorate the anniversary.
Sybirak’s Day is an annual observance celebrated in Poland on September 17. It is dedicated to the Soviet invasion of Poland, which took place in 1939, and the subsequent deportation of more than 300,000 Polish citizens to Siberia.
Patient Safety Day in Ukraine is celebrated on September 17, coinciding with World Patient Safety Day. It was officially established by President Volodymyr Zelensky in September 2019.
Marathwada Liberation Day (Marathwada Mukti Sangram Din) is an annual holiday celebrated on September 17 in the Indian state of Maharashtra. It commemorates the anniversary of Operation Polo that resulted in the Indian annexation of Hyderabad, which included Marathwada.
In Spain, there are two autonomous cities located on the north coast of Africa, Ceuta and Melilla. In addition to public holidays celebrated throughout Spain, each of them has its own regional holidays. For example, the residents of Melilla annually celebrate Melilla Day on September 17.
Siquijor Day (Araw ng Siquijor) is a special non-working holiday in the province of Siquijor, Philippines. It is celebrated annually on September 17 to commemorate the province’s founding anniversary.
Zamboanga del Sur Day (Araw ng Zamboanga del Sur) is a special non-working holiday in the Philippine province of Zamboanga del Sur. It is celebrated on September 17 to commemorate the province’s creation anniversary.
The National Apple Dumpling Day is celebrated on September 17. It is dedicated to pastry which is believed to have originated in northeastern United States.
September 17 is a great day to have a delicious sandwich for breakfast or lunch because it is National Monte Cristo Day. It celebrates a fried ham and cheese sandwich inspired by the French sandwich croque monsieur.
World Patient Safety Day is an annual observance that takes place on September 17. It was officially established by the World Health Organization (WHO) at the 72nd World Health Assembly that was held in Geneva, Switzerland in May 2019.
On September 17 every year, Ukrainians mark Adoption Day. The holiday dedicated to all adoptive parents, foster parents, and guardians was added to the Ukrainian holiday calendar in 2008 and celebrated for the first time in 2009.
National Fitness Day is the biggest celebration of fitness and health in the United Kingdom. It is held annually on the third Wednesday of September.
This Day in History
- 2011 The protest movement Occupy Wall Street began in Zuccotti Park, New York City. Its main issues were social and economic inequality.
- 1996 Born: Ella Purnell, English actress. She is best known for her television roles as Jackie Taylor on Yellowjackets and as Lucy MacLean on Fallout.
- 1994 Died: Karl Popper, Austrian-British philosopher and professor considered to be one of the greatest philosophers of science of the 20th century.
- 1991 Born: Mena Massoud, Egyptian-Canadian actor whose breakthrough came with playing the title character in the Disney fantasy film Aladdin.
- 1991 The first version of the Linux kernel was released. It was initially conceived and developed by Finnish computer science student Linus Torvalds.
- 1989 Born: Danielle Brooks, American actress and singer. Her breakthrough role was as prison inmate Tasha "Taystee" Jefferson in the Netflix series Orange Is the New Black.
- 1988 Born: Ritu Arya, English actress. She is known for her roles as her roles as Flash in the Channel 4 series Humans and Lila Pitts in the Netflix series The Umbrella Academy.
- 1988 Died: Hilde Gueden, Austrian soprano who is regarded as one of the most appreciated Mozartian and Straussian sopranos of her day.
- 1985 Died: Laura Ashley, Welsh fashion designer and businesswoman best known for founding the textile design company Laura Ashley plc.
- 1983 Vanessa Lynn Williams became the first African American to be crowned Miss America. Ten months later, she was forced to relinquish her title.
- 1980 A Sardinista commando team ambushed and assassinated Anastasio Somoza Debayle, former President of Nicaragua (Operation Reptile).
- 1978 Born: Nick Cordero, Canadian actor. He was nominated for the Tony Award for Best Featured Actor in a Musical for his role as Cheech in Bullets Over Broadway.
- 1978 Israel and Egypt signed the Camp David Accords. Anwar El Sadat (Egypt) and Menachem Begin (Israel) won a Nobel Peace Prize for this.
- 1968 Born: Anastacia Lyn Newkirk, best known as simply Anastacia, American singer-songwriter and producer noted for her powerful voice.
- 1965 Born: Bryan Singer, American film and television director, producer, writer, and actor. He became widely known for directing X-Men in 2000.
- 1962 Born: Paul Feig, American filmmaker and actor. He is known for directing Bridesmaids, The Heat, Spy, Ghostbusters, A Simple Favor, Last Christmas, and other films.
- 1962 Born: Baz Luhrmann, Australian film director, producer, and screenwriter best known for his films Romeo + Juliet, Moulin Rouge! and The Great Gatsby.
- 1939 Born: Vladimir Menshov, Soviet and Russian actor and film director who won an Oscar for his film Moscow Does Not Believe in Tears in 1979.
- 1935 The German dive bomber and ground-attack aircraft Junkers Ju 87, also known as Stuka, made its first flight. It was widely used by the Luftwaffe.
- 1935 Born: Ken Kesey, American author, best known for his novels One Flew Over the Cuckoo's Nest and Sometimes a Great Notion.
- 1922 Born: António Agostinho Neto, Angolan revolutionary and politician who led the country to independence and served as its first President.
- 1918 Born: Chaim Herzog, Irish-born Israeli lawyer, general, politician, and author who served as the sixth President of Israel from 1983 to 1993.
- 1908 Died: Henri Julien, French Canadian cartoonist and artist primarily remembered for his work for the magazine Canadian Illustrated News.
- 1904 Died: Raden Ajeng Kartini, renowned Indonesian (Javanese) women's rights advocate. She is regarded as a national heroine of Indonesia.
- 1899 Died: Charles Alfred Pillsbury, American flour industrialist best known for co-founding the Pillsbury Company based in Minneapolis.
- 1877 Died: Henry Fox Talbot, British inventor and photography pioneer best known for his invention of the calotype (or talbotype) process.
- 1857 Born: Konstantin Tsiolkovsky, Russian and Soviet rocket scientist and pioneer of the astronautic theory, one of the "fathers of astronautics".
- 1854 Born: David Dunbar Buick, Scottish-born American inventor best known as the founder of the Buick Motor Company based in Detroit, Michigan.
- 1849 African-American abolitionist and humanitarian Harriet Tubman escaped from slavery with her brothers, Henry and Ben. It was her first escape.
- 1836 Died: Antoine Laurent de Jussieu, French botanist who is best known for developing the first natural classification of flowering plants.
- 1809 The Russian Empire and Sweden signed the Treaty of Fredrikshamn, also known as the Treaty of Hamina, that ended the Finnish War.
- 1797 Died: Alfred de Vigny, French poet, playwright, and novelist whose best known works include Éloa, ou La sœur des anges and Cinq-Mars.
- 1789 British astronomer William Herschel discovered Mimas, a moon of Saturn. It was named after one of the Giants in Greek mythology.
- 1787 The United States Constitution was signed in Philadelphia. The document was ratified in 1788 and finally came into force a year later.
- 1730 Born: Friedrich Wilhelm von Steuben, Prussian-born American military officer who served in the Continental Army during the Revolutionary War.
- 1676 Died: Sabbatai Zevi, Ottoman Jewish mystic and ordained rabbi who claimed to be the Jewish Messiah. He founded the Sabbatean movement.