October is the tenth month of the year in the Julian and Gregorian Calendars and the sixth month to have the length of 31 days. The eighth month in the old Roman calendar, October retained its name (from the Latin octō meaning "eight") after January and February were inserted into the calendar that had originally been created by the Romans. In Ancient Rome, one of three Mundus patet would take place on October 5, Meditrinalia October 11, Augustalia on October 12, October Horse on October 15, and Armilustrium on October 19. These dates do not correspond to the modern Gregorian calendar. Among the Anglo-Saxons, it was known as Winterfylleth, because at this full moon (fylleth) winter was supposed to begin.
October is commonly associated with the season of autumn in the Northern hemisphere and spring in the Southern hemisphere, where it is the seasonal equivalent to April in the Northern hemisphere and vice versa.
- 1 October observances
- 1.1 Non-Gregorian observances, 2017
- 1.2 Month-long observances
- 1.3 Movable observances
- 1.3.1 Last Week of September: September 25-Oct 1
- 1.3.2 First Full Week of October: October 2–8
- 1.3.3 First Sunday: October 2
- 1.3.4 First Monday: October 3
- 1.3.5 First Tuesday: October 4
- 1.3.6 First Wednesday: October 5
- 1.3.7 Wednesday of second full week in October: October 5
- 1.3.8 First Thursday: October 6
- 1.3.9 First Friday: October 7
- 1.3.10 Second Saturday: October 8
- 1.3.11 Second Sunday: October 9
- 1.3.12 Week of October 9: October 9–15
- 1.3.13 Week of October 10: October 9–15
- 1.3.14 Second Monday: October 10
- 1.3.15 Second Wednesday: October 12
- 1.3.16 Second Thursday in October: October 13
- 1.3.17 Second Friday: October 14
- 1.3.18 Third Saturday: October 15
- 1.3.19 Work day closest to October 16: October 17
- 1.3.20 Third Monday: October 17
- 1.3.21 Third Thursday: October 20
- 1.3.22 Fourth Saturday: October 22
- 1.3.23 Saturday closest to October 26: October 22
- 1.3.24 Second to last Sunday: October 23
- 1.3.25 Fourth Monday: October 24
- 1.3.26 Last Friday: October 28
- 1.3.27 Last Monday: October 31
- 1.4 Fixed observances
- 2 Miscellaneous
- 3 October symbols
- 4 References
- 5 External links
This list does not necessarily imply either official status or general observance.
Non-Gregorian observances, 2017
(please note that all Jewish observances, which are set by the Hebrew calendar, begin at sunset the day prior to the date listed and end on the sunset of the date in question)
- In Catholic tradition, October is the Month of the Holy Rosary.
- Breast Cancer Awareness Month
- Health Literacy Month
- International Walk to School Month
- Medical Ultrasound Awareness Month
- Rett Syndrome Awareness Month
- World Blindness Awareness Month
The last two to three weeks in October (and, occasionally, the first week of November) are the only time of the year during which each of the "Big Four" major North American professional sports leagues schedule games; the National Basketball Association begins its preseason and about two weeks later starts the regular season, the National Hockey League is about one month into its regular season, the National Football League is about halfway through its regular season, and Major League Baseball is in its postseason with the League Championship Series and World Series. (Additionally, the Canadian Football League is typically nearing the end of its regular season during this period, while Major League Soccer is beginning the MLS Cup Playoffs.)
- National Adopt A Shelter Dog Month 
- National Arts & Humanities Month
- National Bullying Prevention Month
- National Cyber Security Awareness Month
- National Disability Employment Awareness Month
- National Domestic Violence Awareness Month
- Filipino American History Month
- Italian American Heritage Month
- LGBT History Month
- Polish American Heritage Month
- National Work and Family Month
- American Pharmacist Month
- Dwarfism/Little People Awareness Month 
- Eczema Awareness Month 
- National Dental Hygiene Month
- National Down Syndrome Awareness Month
- National Healthy Lung Month
- National Infertility Awareness Month
- Liver Awareness Month
- National Lupus Erythematosus Awareness Month
- National Physical Therapy Month
- National Spina Bifida Awareness Month
- Sudden Infant Death Syndrome Awareness Month  (United States)
United States, Culinary
- Oktoberfest celebrations (varies globally based on area)
- October 5: International Walk to School Day
- October 5: World Cerebral Palsy Day
- October 7: Lee National Denim Day (United States)
- October 8: Astronomy Day (United States)
- October 11: Ada Lovelace Day (International observance) 
- October 19–25: Asexual Awareness Week
- October 20: Get Smart About Credit Day (United States)
- October 20: Spirit Day (International observance)
First Full Week of October: October 2–8
First Sunday: October 2
- Day of Prayer for the Peace of Jerusalem (Pentecostal Christianity)
- Father's Day (Luxembourg)
- Teachers' Day (Belarus, Latvia)
- World Communion Sunday (Christianity)
First Monday: October 3
- Child Health Day (United States)
- Children's Day (Chile, Singapore)
- Labour Day (Australian Capital Territory, New South Wales, South Australia, Queensland, Australia)
- Territory Day (Christmas Island, Australia)
- Thanksgiving (Saint Lucia)
- World Architecture Day
- World Habitat Day
First Tuesday: October 4
First Wednesday: October 5
- Children's Day (Chile)..
Wednesday of second full week in October: October 5
- National Fossil Day (United States)
First Thursday: October 6
- National Poetry Day (UK, Ireland)
First Friday: October 7
Second Saturday: October 8
- International Migratory Bird Day (Mexico, Central and South America, and the Caribbean)
- Home Movie Day (International observance)
- National Tree Planting Day (Mongolia)
Second Sunday: October 9
Week of October 9: October 9–15
- Fire Prevention Week (Canada, United States)
- Fire Service Recognition Day (Canada), last day of Fire Prevention Week
Week of October 10: October 9–15
- Fiji Week (Fiji)
Second Monday: October 10
- Columbus Day (United States)
- Fraternal Day (Alabama, United States)
- Health and Sports Day (Japan)
- Mother's Day (Malawi)
- Norfolk Island Agricultural Show Day (Norfolk Island)
- Thanksgiving (Canada)
Second Wednesday: October 12
Second Thursday in October: October 13
Second Friday: October 14
Third Saturday: October 15
- Sweetest Day (United States)
Work day closest to October 16: October 17
- Boss's Day (United States, Canada, Lithuania and Romania)
Third Monday: October 17
Third Thursday: October 20
Fourth Saturday: October 22
Saturday closest to October 26: October 22
Second to last Sunday: October 23
Fourth Monday: October 24
- Labour Day - New Zealand
Last Friday: October 28
- National Bandanna Day (Australia)
- Nevada Day (Nevada, United States)
- Teacher's Day (Australia) (If the last Friday is on October 31, this holiday is moved to November 7)
Last Monday: October 31
- October Holiday (Ireland)
- October 1
- Armed Forces Day (South Korea)
- Children's Day (El Salvador, Guatemala, Sri Lanka)
- Day of Prosecutors (Azerbaijan)
- Continuance of German American Heritage Month, which runs from September 15-October 15 
- Continuance of National Hispanic Heritage Month (United States), which runs from September 15-October 15
- Independence Day (Cyprus)
- Independence Day (Nigeria), celebrates the independence of Nigeria from United Kingdom in 1960.
- Independence Day (Palau, Tuvalu)
- International Day of Older Persons
- Lincolnshire Day (United Kingdom)
- National Day of the People's Republic of China (People's Republic of China)
- Pancasila Sanctity Day (Indonesia)
- Teacher's Day (Uzbekistan)
- Unification Day (Cameroon)
- World Vegetarian Day
- October 2
- October 3
- October 4
- October 5
- October 6
- October 7
- October 8
- October 9
- October 10
- October 11
- October 12
- October 13
- October 14
- October 15
- Breast Health Day (Europe)
- Evacuation Day (Tunisia)
- Global Handwashing Day
- King Father's Commemoration Day (Cambodia)
- National Latino AIDS Awareness Day (United States)
- Pregnancy and Infant Loss Remembrance Day (United States and Canada)
- Spirit Day (International observance)
- Teachers' Day (Brazil)
- White Cane Safety Day (United States)
- October 16
- October 17
- October 18
- October 19
- October 20
- October 21
- Apple Day (United Kingdom)
- Armed Forces Day (Honduras)
- Egyptian Naval Day (Egypt)
- Indian Police Commemoration Day (India)
- International Day of the Nacho
- National Nurses' Day (Thailand)
- Ndadaye Day (Burundi)
- Overseas Chinese Day (Republic of China)
- Trafalgar Day (the British Empire in the 19th and early 20th century)
- October 22
- October 23
- October 24
- October 25
- October 26
- Intersex Awareness Day (United States)
- October 27
- October 28
- October 29
- October 30
- Anniversary of the Declaration of the Slovak Nation (Slovakia)
- Day of Remembrance of the Victims of Political Repressions (former Soviet republics, except Ukraine)
- Indonesian Banknote Day (Indonesia)
- International Orthopaedic Nurses Day
- Mischief Night (United States and Canada)
- Thevar Jayanthi (Thevar community, India)
- October 31
- Día de la Canción Criolla (Peru)
- Eve of Winter, the eve of the first day of winter in the Northern hemisphere:
- Allantide (Cornwall, United Kingdom)
- The first day of the Day of the Dead, celebrated until November 2 (Mexico)
- Halloween (English-speaking countries, also in other locations)
- Hop-tu-Naa (Isle of Man, United Kingdom)
- Samhain in the Northern Hemisphere, Beltane in the Southern Hemisphere; begins on sunset of October 31 (Gaels, Welsh people and Neopagan Wheel of the Year)
- Girl Scouts Founders Day (United States)
- King Father's Birthday (Cambodia)
- National Unity Day (India)
- Reformation Day (Slovenia, parts of Germany, Chile, El Salvador, Dominican Republic, Evangelical Churches and Lutheran Churches)
- Saci day (Brazil)
- World Savings Day
- Eric Whitacre composed a piece based on this month, titled October.
- Neil Gaiman wrote a story personifying the month, titled "October in the Chair", for his 2006 collection Fragile Things.
- Ray Bradbury published a collection of short stories titled The October Country in 1955.
- October's birthstones are the tourmaline and opal.
- Its birth flower is the calendula.
- The zodiac signs for this month are Libra (until October 22) and Scorpio (from October 23).
October Star Stones:
- Libra (Sept. 22 to Oct. 22)
Planetary Stone: Sapphire; Lucky Charms: Opal, Sardonyx, Chrysolite; birthstone: pink Tourmaline, Opal
- Scorpio (Oct. 23 to Nov. 21)
Planetary Stone: Garnet, Ruby; Lucky Charms: Aquamarine, Beryl
- October Lokesh birthstone is roser.
- October Mystical birthstone is Jasper.
- October Ayurvedic Birthstone is Opal.
- Chisholm, Hugh, ed. (1911). "October". Encyclopædia Britannica (11th ed.). Cambridge University Press.
- "CATHOLIC ENCYCLOPEDIA: Special Devotions For Months". Newadvent.org. Retrieved 2012-10-24.
-  Archived February 8, 2007, at the Wayback Machine.
- "October is Adopt a Shelter Dog Month". ASPCA. Retrieved 2014-10-17.
- http://www.staysafeonline.info/content/about-ncsam Archived October 5, 2009, at the Wayback Machine.
- "Italian Heritage and Culture Month". Italyculturemonth.org. Retrieved 2011-11-01.
- "American Pharmacists Month 2011". Pharmacist.com. Retrieved 2011-11-01.
- "Little People of America".
- "Eczema Awareness Month - National Eczema Association". National Eczema Association.
- "ADHA – October is National Dental Hygiene Month". Adha.org. Retrieved 2011-11-01.
- National Down Syndrome Society – October is Down Syndrome Awareness Month Archived February 25, 2008, at the Wayback Machine.
- "Observing Infertility Awareness Month". Library.adoption.com. Retrieved 2011-11-01.
-  Archived November 21, 2007, at the Wayback Machine.
- APTA | National Physical Therapy Month Archived January 5, 2009, at the Wayback Machine.
- "Spina Bifida Association – Spina Bifida Association". Sbaa.org. Retrieved 2011-11-01.
- "National Pizza Month". Pizza.com. Retrieved 2012-10-24.
- "Popcorn Poppin' Month". Popcorn.org. Retrieved 2012-10-24.
- "October is National Pork Month". ThePigSite. 2007-10-02.
- "Banned Books Week". Banned Books Week. Retrieved 2016-08-05.
- "Gemstone Leaflet" (PDF). Jewelers of America. Retrieved Jan 22, 2012.
- SHG Resources. "Birth Months, Flowers, and Gemstones". SHG Resources. Retrieved 2011-11-01.
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