The autumnal equinox—also called the September or fall equinox—is the astronomical start of fall in the Northern Hemisphere and spring in the Southern Hemisphere.  Due to differences between the calendar year and the tropical year, this equinox can occur at any time between September 21 and 24.

First Day of Fall

Day of Knowledge

In September of 1878, Emma M Nutt became the first female phone operator, and from that point forward it’s been a woman’s industry. This day celebrates this pioneer in communication..

Emma M Nutt Day

Consitution Day is a public holiday in Slovakia and is always celebrated on 1 September. In Slovak, this holiday is called 'Deň Ústavy Slovenskej republiky' and it commemorates the adoption of the Slovak constitution on 1 September 1992. Constitution Day is Slovakia'a National Day.

Constitution Day - Slovakia

National Day is a national holiday in Vietnam observed on 2 September, commemorating President Hồ Chí Minh reading the Declarations of independence of Vietnam at Ba Đình Square in Hanoi on 2 September 1945. It is the country's National Day.

Independence Day -Vietnam

Labor Day in the United States of America is a public holiday celebrated on the first Monday in September. It honors the American labor movement and the contributions that workers have made to the sustainability, persistence, structure, and well-being of the country..

Labour Day -US

Labour Day -Canada

National Welsh Rarebit Day is observed annually on September 3rd.  What is a rarebit?  It is actually a Welsh term for “rabbit”.

National Welsh Rarebit Day

Each year league bowlers across the United States recognize U.S. Bowling League Day on September 3rd.

US Bowling League Day

The People's Republic of China (PRC) observes Victory Day on 3 September.

Victory Day - China

This National Day is an opportunity to learn more about endangered species, preservation and conservation efforts around the world.

National Wildlife Day

Annually observed on September 4 since 2010, World Sexual Health Day (WSHD) is an awareness day managed by the World Association for Sexual Health (WAS), a global advocacy organization committed to promoting best practices in sexual health.

World Sexual Health Day

The prime purpose of the International Day of Charity is to raise awareness and provide a common platform for charity related activities all over the world.

International Day of Charity

National Read A Book Day is observed annually on September 6th.  On August 9th, we all celebrated National Book Lovers Day.

National Read a Book Day

The Independence Day of Brazil, commonly called Sete de Setembro (Seventh of September, is a national holiday observed in Brazil on 7 September of every year. The date celebrates Brazil's Declaration of Independence from the United Kingdom of Portugal, Brazil and the Algarves on 7 September 1822.

Independence Day -Brazil

8 September was declared international literacy day by UNESCO on 26 October 1966 at 14th session of UNESCO's General conference.

International Literacy Day

Agong’s Birthday is a holiday that is oriented around the celebration of the Malaysian King’s Birthday. In Malaysia, the King is referred to as Yang di-Pertuan Agong.

Birthday of Yang di-Pertuan Agong (Malaysia)

In the People's Republic of China, there are some activities for students to show their appreciation to teachers, such as presenting gifts, including cards and flowers. In addition, many former students will go back to their old primary schools, middle schools and high schools.

Teachers' Day -China

National Grandparents Day is a secular holiday celebrated in various countries, with official recognition in some, and occurring on various days of the year. #NationalGrandparentsDay

National Grandparents Day

Rosh Hashanah, literally meaning the "head [of] the year", is the Jewish New Year. The biblical name for this holiday is Yom Teruah, literally "day of shouting or blasting". It is the first of the Jewish High Holy Days specified by Leviticus 23:23–32.

Rosh Hashanah -Jewish

Swap Ideas Day, which is observed annually on September 10th, encourages us to share a creative or helpful idea with someone and trade them for their ideas in return. Throughout the day, generate ideas that lead to solutions and new products, or influence on social media with #NationalSwapIdeasDay.

Swap Ideas Day

This federally-recognized day of unity and charitable service is observed annually on the anniversary of the 9/11 terrorist attacks. Americans across the country are called to volunteer in their local communities in tribute of the lives lost, the service of first responders and defenders of freedom.

National Day of Service and Remembrance

Rosh Hashanah, literally meaning the "head [of] the year", is the Jewish New Year. The biblical name for this holiday is Yom Teruah, literally "day of shouting or blasting". It is the first of the Jewish High Holy Days specified by Leviticus 23:23–32 that occur.

Rosh Hashanah (End)

National Video Games Day is observed annually on Sept 12 and gamers enjoy this day with much pride and enthusiasm. On this special day, invite your friends over for a round of your favorite multiplayer game, hit an arcade to revisit the classics or treat yourself to a newly released game or console.

National Video Games Day

The Fast of Gedalia, also transliterated from the Hebrew language as Gedaliah or Gedalya(h), is a minor Jewish fast day from dawn until dusk to lament the assassination of the righteous governor of Judah. His murder ended Jewish autonomy following the destruction of the First Temple.

Fast of Gedaliah

The National Day of Encouragement in the United States was announced in 2007 and occurs annually on September 12. The day is dedicated to uplifting those around us and making a positive impact. Make sure to use #Nationaldayofencouragement on social media and continue encouraging others beyond this.

National Day of Encouragement

On the 256th day of each year, this day honors all programmers, as there is hardly a person in the civilized world who doesn't benefit from their work. The number 256 is distinct to programmers. Represented by an eight-bit byte 256 equals 2 to the eighth. It is officially recognized in Russia.

International Programmers Day

For many, the gobstopper candy stands out as a beacon of childhood, and have been one of the most popular candies throughout the Americas and UK since World War I. Gobstopper Day celebrates the history the candies share with generations of children, so make sure to indulge with a gobstopper today!

Gobstopper Day

United Nations General Assembly observe 15 September as the International Day of Democracy with the purpose of promoting and upholding the principles of democracy and invited member states and organizations to commemorate the day in an appropriate manner that contributes to raising public awareness.

International Day of Democracy

Respect for the Aged Day is a Japanese designated public holiday celebrated annually to honor elderly citizens. It started in 1966 as a national holiday and was held on every September 15. Since 2003, Respect for the Aged Day is held on the third Monday of September due to the Happy Monday System.

Respect for Aged Day

Independence Day is a Mexican holiday to celebrate the “cry of independence” on September 16, 1810, which started a revolt against the Spaniards. It follows from the day of the Cry of Dolores, on September 15.

Independence Day -Mexico

Malaysia Day is held on 16 September every year to commemorate the establishment of the Malaysian federation on the same date in 1963. It marked the joining together of Malaya, North Borneo, Sarawak and Singapore to form Malaysia. Singapore was expelled on 9 August 1965 after two years.

Malaysia Day

Designated by the United Nations General Assembly as the International Day for the Preservation of the Ozone Layer, in commemoration of the date when nations signed the Montreal Protocol. On this day, try to champion sustainability and clean energy, or even better, practice it in your daily life!

International Day for the Preservation of the Ozone Layer

Still’s Disease Awareness Day was established to celebrate Still’s patients globally, annually on September 17th. The goal is to increase awareness and education about Still’s so we can expedite diagnosis, improve disease management, and help patients explain their disease to others.

Still's Disease Awareness Day

Observed annually every third Tuesday in September, National IT Professionals Day is set aside to honor the venerable geeks and unsung heroes of the world who we all rely on to keep us connected. On this day, remember to say thank you other IT Professionals and share #ITProDay on your social media.

National IT Professionals Day

This day honors of one of the most iconic and delicious examples of American cuisine, and has been taking place every year since the early part of the Roaring 20s era. To celebrate this day, grill up some cheeseburgers for your friends and family, or visit your favorite burger joint to indulge!

National Cheeseburger Day

Yom Kippur, also known as the Day of Atonement, is the holiest day of the year in Judaism. Its central themes are atonement and repentance. Jews traditionally observe this holy day with a 25-hour period of fasting and intensive prayer, often spending most of the day in synagogue services.

Yom Kippur

The program aims to build public awareness and involvement in protecting water resources around the world by empowering citizens to carry out basic monitoring of their local water bodies. Join 1.5 million participants globally by uploading results from your test kits onto the EarthEcho database,

World Water Monitoring Day

A parodic holiday created in 1995 by John Baur and Mark Summers, of Albany, Oregon, U.S. They proclaimed September 19th of each year as the day when everyone in the world should talk like a pirate. An observer of this holiday would greet friends not with with "Ahoy, maties!" or "Ahoy, me hearties!".

International Talk Like a Pirate Day

German World Children's Day (Thuringia)

This holiday celebrates the enjoyment of rum punch. Rum punch is an age old recipe, made by distilling fermented sugar from sugar cane and is fermented from cane juice or molasses. On National Rum Punch Day, why not have yourself a punch party and share a bowl of rum punch between your friends!

National Rum Punch Day

The International Day of Peace, sometimes unofficially known as World Peace Day, is a United Nations-sanctioned holiday observed annually on 21 September. It is dedicated to world peace, and specifically the absence of war and violence, such as might be occasioned by a temporary ceasefire.

International Day of Peace

The International Day of Peace, sometimes unofficially known as World Peace Day, is observed annually on 21 September. The UN General Assembly has declared this to be devoted to strengthening  ideals of peace among all nations and peoples through observing 24 hours of non-violence and cease-fire.

International Day of Peace (World)

Chuseok Holiday

Today Armenians celebrate their independence and culture, with festivities, fireworks, and flag-waving all over the Eurasian country. The colors of the flag can be seen waving in cities and towns throughout Armenia, and especially in the National Day parade through the capital city of Yerevan.

Independence Day -Armenia

Independence Day is one of the five national holidays in Malta. It celebrates the day the country gained independence from the United Kingdom on 21 September 1964. Throughout its existence, Malta had a long and complex history which resulted in the island being ruled by a plethora of foreign rulers.

Independence Day -Malta

The Mid-Autumn Festival is a harvest festival celebrated notably by the Chinese and Vietnamese people. The festival is held on the 15th day of the 8th month of the lunar calendar with full moon at night, corresponding to late September to early October of the Gregorian calendar with a full moon.

Mid-Autumn Festival - Hong Kong

Mid-Autumn Festival- China

This day is dedicated to help educate the public about the responsibilities of dog ownership and help current owners enhance their relationships with their pets to ensure that they lead happy and healthy lives. Use #Responsibledogownershipday to share any suggestions or experiences on social media.

AKC Responsible Dog Ownership Day

Car Free Day, which is celebrated on September 22, encourages motorists to give up their cars for a day. Organized events are held in some cities and countries, to the environment and reflect on the use of public transport. On this day, why not try using a bicycle or public transport to commute!

Car Free Day

International Day of Sign Languages (IDSL) is celebrated annually across the world on 23 September every year along with International Week of the Deaf. This day aims to raise awareness on the importance of preserving sign languages in realization of the human rights of people who are deaf.

International Day of Sign Languages

Chuseok

Independence Day is a public holiday observed in Mali on 22nd September. Also known as Republic Day, this is Mali's National day and commemorates the independence of the Republic of Mali from the Mali Federation on 22 September 1960.

Independence Day -Mali

Day of Saint Tecla (Tarragona)

September 23 has been celebrated globally as Bi Visibility Day since 1999. The day aims to provide a platform to the bisexual community and their supporters and to bring global attention to the social, economic and cultural prejudices and challenges faced by bisexual people.

International Celebrate Bisexuality Day

Saudi National Day is celebrated in Saudi Arabia on every 23 September to commemorate the renaming of the Kingdom of Nejd and Hejaz to the Kingdom of Saudi Arabia by a royal decree from King Abdul Aziz Ibn Saud in 1932. It is a National Holiday. The number of lunar, not solar, years are commemorated

National Day of Saudi Arabia

Sukkot, commonly translated as Festival of Tabernacles also known as Chag HaAsif, the Festival of Ingathering, is a biblical Jewish holiday celebrated on the seventh month, Tishrei.

Sukkot (Start)

Autumnal Equinox Day is a public holiday in Japan that usually occurs on September 28 or 29, the date of Southward equinox in Japan Standard Time. Due to the necessity of recent astronomical measurements, the date of the holiday is not officially declared until February of the previous year.

Autumn Equinox

Founded by Jeff Rubin in 2004, National Punctuation Day simply commemorates the correct usage of punctuation. To observe #NationalPunctuationDay , start by practicing proper punctuation and share it on your social media, or spend the day trying to correct the mistakes you or those around you make!

National Punctuation Day

This provincial holiday is observed in South Canterbury, New Zealand. Also known as Canterbury (South) Anniversary Day or Dominion Day, It is celebrated on the fourth Monday in September.

South Canterbury Anniversary Day

It is recommended that homeowners tune up their heating systems every year in advance of seasonal changes to ensure that they operate efficiently. This includes removing dust and dirt in your vents, making sure your vents are not blocked or leaking and ensuring fuel-jets are working correctly.

National Tune-Up Day

The Apple Market Festival is held in Kivik which was particularly dedicated to Sweden’s food industry. Since 1987, the whole town has come together at this festival in celebration of the end of the harvest season. Make sure to drop by for a celebration, or whip up your favorite apple dishes at home!

Apple Day

The history of this celebration dates back to the mid-2000s when Marianne Ways and Colleen AF Venable decided it was time to celebrate the archetypal woodsman, the lumberjack. To celebrate this day, dress up in your favorite plaid shirt and invite your friends over for a lumberjack themed party!

Lumberjack Day

World Tourism Day (WTD) is held annually on 27 September to foster awareness among the international community of the importance of tourism. Use this day to plan a trip in your bucket list, promote cultural sites or raise awareness about better working conditions within the tourism industry!

World Tourism Day (WTD)

World Tourism Day (WTD) is held annually on 27 September. Its purpose is to foster awareness among the international community of the importance of tourism and its social, cultural, political and economic value.

World Tourism Day

This food holiday is observed each year on September 26. To celebrate, whip up a batch of pancakes to share with your friends and family or order up a stack of syrupy goodness from your favorite diner. Don't forget to share your experience or recipes with #NationalPancakeDay on social media!

National Pancake Day

The AFL Grand Final holiday is the newest public holiday in the state of Victoria. The date of the holiday is on the Friday preceding the Australian Football League Grand Final. The holiday is also referred to as “AFL Grand Final Friday”.

AFL Grand Final Friday

This is an international day of recognition designated by the UNESCO General Conference, inaugurated in November 2015 and was first held on 28 September 2016. Its aim was to raise awareness on universal access to information so that everyone has the right to seek, receive and impart information.

International Right to Know Day

The World Heart Foundation organizes World Heart Day, celebrated globally on September 29 to inform people about cardiovascular diseases and promote preventative measures to reduce its risk. Share #UseHeart on social media to share healthy lifestyle changes and influence your social circle.

World Heart Day

International Podcast Day on September 30th celebrates the influence of podcasts.  Use this day to connect with fellow podcasters, podcast listeners and podcast enthusiasts.  To celebrate, catch up with your favorite podcast, or take some time to discover new podcasts that tickle your fancy!

International Podcast Day

The seventh day of Sukkot is known as Hoshana Rabbah while the eighth day is known as Shmini Atzeret and the day after is called Simchat Torah. Hoshana Rabbah is known as the day of the final sealing of judgment, which began on Rosh Hashanah.

Sukkot (End)

Shemini Atzeret is a Jewish holiday. It is celebrated on the 22nd day of the Hebrew month of Tishrei in the Land of Israel, and on the 22nd and 23rd outside the Land, usually coinciding with late September or early October.