September comes from the Latin word septem, meaning “seven,” originally the seventh month in the Roman calendar. After adding January and February to the calendar, September became the ninth month. Because of the harvesting season, September’s beauty shines, bringing forth nature’s bounty and painting the landscape with vibrant colors.
01SepDay of Constitution of Slovak Republic
The Constitution of the Independent Slovakian Republic was adopted on September 1, 1992, in Bratislava.
01SepUzbekistan Independence Day
Uzbekistan celebrates its Independence Day on September 1, marking its separation from the Soviet Union in 1991.
01SepEritrea Revolution Day
Eritrea Revolution Day is celebrated on September 1. This day commemorates the start of the Eritrean War for Independence in 1961.
02SepVietnam National Day
Vietnam’s National Day, celebrated on September 2, commemorates the day in 1945 when President Ho Chi Minh proclaimed the Declaration of Independence in Hanoi.
03SepAustralian National Flag Day
The flag of Australia was first flown on 3rd September 1901 in Melbourne, and this marks the Australian National Flag Day.
03SepSan Marino Foundation Day
San Marino Foundation Day is celebrated on September 3. This day marks the Foundation of the city by Marinus in the year 301 (traditional date), also St. Marinus Day.
06SepEswatini Independence Day
Somhlolo Day in Eswatini (Swaziland) is celebrated on September 6. It marks the day of
independence gained from the United Kingdom in 1968.07SepIndependence of Brazil
September 7 marks the Declaration of Independence of Brazil from Portugal by Prince Pedro in 1822.
08SepAndorra National Day
Andorra National Day is celebrated on September 8, commemorating the country’s independence from the French and Spanish monarchies in 1278.
08SepIndependence Day of North Macedonia
North Macedonia’s Independence Day is celebrated on September 8. It marks the day of independence from Yugoslavia, achieved with the 1991 referendum.
09SepTajikistan Independence Day
Officially known as the Day of State Independence of the Republic of Tajikistan, September 9 is the main national holiday of the country. It was the day the Supreme Soviet of the Tajik SSR adopted the Declaration “On the Sovereignty of the Republic of Tajikistan.”
15SepHonduras Independence Day
Independence Day of Honduras is celebrated on September 15, commemorating the country’s liberation from Spanish rule in 1821.
15SepEl Salvador Independence Day
El Salvador Independence Day is celebrated on September 15 each year. It marks the nation’s independence from Spain in 1821.
15SepCosta Rica Independence Day
Declaration of Independence of Costa Rica from Spanish Rule, September 15, marks the final Spanish defeat in the Mexican War of Independence.
15SepGuatemala Independence Day
September 15 marks the declaration of independence from the Spanish Empire by the Captaincy General of Guatemala in 1821. It is celebrated as the Independence Day of Guatemala.
15SepNicaragua Independence Day
Independence Day of Nicaragua is celebrated on September 15 annually, marking its freedom from the Kingdom of Spain in 1821.
16SepMexico Independence Day
Grito de Dolores, or Cry of Dolores, is celebrated on September 16 annually as Mexico’s Independence Day. This day marks the beginning of the War of Independence from Spain in 1810.
16SepMalaysia Day
Malaysia Day, celebrated on September 16 each year, commemorates the establishment of the Malaysian Federation on this date in 1963. It marks the formation of Malaysia by uniting Malaya, Sabah, Sarawak, and Singapore into a single country. This day is proposed to be the second national day after Hari Merdeka.
16SepPapua New Guinea Independence Day
Papua New Guinea Independence Day is celebrated on September 16 to mark its freedom from Australia in the year of 1975.
16SepBisexual Awareness Week
Also known as #BiWeek, Bisexual Awareness Week is an annual celebration held from the 16th to 23rd September – the last day is Bisexuality Day. Bisexuals comprise close to 40% of the LGBTQA+ community.
18SepChile National Day
In memory of the proclamation of Chile as an autonomous republic within the Spanish monarchy, the National Day of the country is celebrated on September 18 annually.
19SepNepal Constitution Day
Constitution Day in Nepal is observed on September 19th to commemorate the adoption of the new constitution in 2015.
19SepSaint Kitts and Nevis Independence Day
Independence from Great Britain is celebrated on September 19 each year by the citizens of Saint Kitts and Nevis. The Nation proclaimed its Independence in the year 1983.
21SepMalta Independence Day
One of the five national holidays in Malta, Independence Day is celebrated on September 21 every year, marking its freedom from the United Kingdom in 1964.
21SepArmenia Independence Day
The main state holiday of Armenia, 21st September, is celebrated as Independence Day in the country, marking the referendum by the Armenian SSR to be free from the Soviet Union.
21SepBelize Independence Day
Belize Independence Day is celebrated on September 21. It is a day when “British Honduras” became “Belize” in 1973 and was granted independence by Great Britain in 1981.
22SepMali Independence Day
Mali Independence Day is marked on 22 September to commemorate the independence of Mali from France in 1960.
22SepBulgaria Independence Day
Bulgarian Independence Day, celebrated on September 22, marks the country’s declaration of independence from the Ottoman Empire in 1908.
23SepCelebrate Bisexuality Day
Celebration of Bisexuality Day is held on September 23 each year. It is the last day of the #BiWeek. The day is also known as Bisexual Visibility or Bi Pride Day and was first observed in 1999 at the International Lesbian and Gay Association Conference in Johannesburg, South Africa.
23SepSaudi National Day
The Saudi National Day is celebrated on September 23 annually. It marks the unification of the two kingdoms of Hejaz and Nejd to create the Kingdom of Saudi Arabia.
24SepGuinea-Bissau National Day
Guinea-Bissau National Day is celebrated on September 24, commemorating the country’s independence from Portugal in 1974.
24SepTrinidad and Tobago Republic Day
Republic Day of Trinidad and Tobago is celebrated on September 24 every year, marking the nation’s transition to a republic in 1976.
24SepCambodia Constitution Day
Cambodia celebrates its Constitution Day on September 24 to commemorate the signing of the Cambodian constitution by King Norodom Sihanouk.
27SepIndependence Day of Turkmenistan
Independence Day of Turkmenistan is celebrated on September 27. It commemorates the declaration of the country’s freedom from the Soviet Union in 1991.
30SepBotswana Independence Day
Botswana Independence Day is celebrated on September 30. On this day, Botswana declared its independence from the United Kingdom in the year of 1966.
30SepMartyrs’ Day
Martyrs’ Day is celebrated on September 30 every year in China. This day was marked to honor all the fallen of the Country.
There are very important events other than the national event in the month of September. To begin with, International Literacy Day (Sept 8), promoting education and literacy worldwide, the focus then shifts to mental health with World Suicide Prevention Day (Sept 10). Mid-month, the world celebrates democracy on International Day of Democracy (Sept 15), followed by World Ozone Day (Sept 16), highlighting environmental protection. Later, the International Day of Peace (Sept 21) and World Alzheimer’s Day (Sept 21) promote unity and awareness about dementia. The month concludes with World Tourism Day (Sept 27), World Rabies Day (Sept 28), and other observances that inspire positive change and global solidarity.