September Holidays and Observances
Every fixed-date holiday and observance in September, from international days to national holidays and religious feast days. Select a day to see its full list. The dates are the same every year, so holidays whose date moves, such as Easter, are not listed. All entries come from Wikipedia.
- International
- National and local
- Religious feast days
1
17 holidays
2
22 holidays
3
19 holidays
4
16 holidays
5
13 holidays
6
15 holidays
7
16 holidays
8
23 holidays
9
21 holidays
10
14 holidays
11
23 holidays
12
17 holidays
13
15 holidays
14
14 holidays
15
19 holidays
16
18 holidays
17
17 holidays
18
15 holidays
19
15 holidays
20
17 holidays
21
18 holidays
22
22 holidays
23
20 holidays
24
21 holidays
25
14 holidays
26
16 holidays
27
14 holidays
28
22 holidays
29
13 holidays
30
12 holidays
All September holidays by day
September 1
National and local
Religious feast days
- Feast of Creation (Christianity) Wikipedia
- Constantius (Costanzo) of Aquino Wikipedia
- David Pendleton Oakerhater (Anglican Communion) Wikipedia
- Giles Wikipedia
- Blessed Giuliana of Collalto Wikipedia
- Isabel Cristina Wikipedia
- Loup (Lupus) of Sens Wikipedia
- Nivard (Nivo) Wikipedia
- Sixtus of Reims Wikipedia
- Terentian (Terrence) Wikipedia
- Verena Wikipedia
- Vibiana Wikipedia
- The beginning of the new liturgical year (Eastern Orthodox Church and the Eastern Catholic Church) and Creationtide Wikipedia
- September 1 (Eastern Orthodox liturgics) Wikipedia
September 2
National and local
- Democracy Day (Tibet) Wikipedia
- Independence Day (Transnistria, unrecognized) Wikipedia
- Independence Day (Artsakh, unrecognized) Wikipedia
- National Blueberry Popsicle Day (United States) Wikipedia
- National Day, celebrates the independence of Vietnam from Japan and France in 1945 Wikipedia
- Victory over Japan Day (United States) Wikipedia
- Sedantag (German Empire) Wikipedia
Religious feast days
- Acepsimas of Hnaita and companions (Syriac Orthodox Church) Wikipedia
- Agricola of Avignon Wikipedia
- Antoninus of Pamiers Wikipedia
- Brocard Wikipedia
- Diomedes Wikipedia
- Eleazar Wikipedia
- Hieu (abbess) Wikipedia
- Holy September Martyrs Wikipedia
- Ingrid of Sweden Wikipedia
- Justus of Lyon Wikipedia
- Margaret of Louvain Wikipedia
- Maxima of Rome Wikipedia
- Nonnosus Wikipedia
- William of Roskilde Wikipedia
- September 2 (Eastern Orthodox liturgics) Wikipedia
September 3
National and local
- China's victory over Japan commemoration related observances: Armed Forces Day (Republic of China) Wikipedia
- China's victory over Japan commemoration related observances: V-J Day (People's Republic of China) Wikipedia
- Flag Day (Australia) Wikipedia
- Independence Day, celebrates the second independence of Qatar from the United Kingdom in 1971 Wikipedia
- Levy Mwanawasa Day (Zambia) Wikipedia
- Merchant Navy Remembrance Day (Canada) Wikipedia
- Merchant Navy Day (United Kingdom) Wikipedia
- National Welsh Rarebit Day (United States) Wikipedia
- Tokehega Day (Tokelau, New Zealand) Wikipedia
Religious feast days
- Blessed Bartholomew Gutierrez Wikipedia
- Blessed Brigida Morello Zancano Wikipedia
- Mansuetus of Toul Wikipedia
- Marinus Wikipedia
- Phoebe Wikipedia
- Pope Gregory I Wikipedia
- Remaclus Wikipedia
- Prudence Crandall (Episcopal Church (USA)) Wikipedia
- September 3 (Eastern Orthodox liturgics) Wikipedia
- Feast of San Marino and the Republic, celebrates the foundation of the Republic of San Marino in 301 Wikipedia
September 4
National and local
Religious feast days
- Candida the Elder Wikipedia
- Blessed Catherine of Racconigi Wikipedia
- Blessed Dina Bélanger Wikipedia
- Hermione of Ephesus Wikipedia
- Ida of Herzfeld Wikipedia
- Irmgardis (of Süchteln) Wikipedia
- Moses and Aaron (Catholic, Lutheran Church and Eastern Orthodox Church) Wikipedia
- Paul Jones (Episcopal Church) Wikipedia
- Rosalia Wikipedia
- Rose of Viterbo Wikipedia
- Rufinus, Silvanus, and Vitalicus Wikipedia
- Thamel and companions Wikipedia
- Ultan of Ardbraccan Wikipedia
- September 4 (Eastern Orthodox liturgics) Wikipedia
September 5
International
- International Day of Charity Wikipedia
National and local
- Earliest date on which Jeûne genevois can fall, while September 11 is the latest; celebrated on Thursday after the first Sunday of September. (Canton of Geneva) Wikipedia
- Teacher's Day (India) Wikipedia
- The flag-flying day for Denmark's deployed personnel (Denmark) Wikipedia
- First day of school in Vietnam Wikipedia
Religious feast days
September 6
National and local
- The earliest date on which the Abbots Bromley Horn Dance is performed Wikipedia
- Armed Forces Day (São Tomé and Príncipe) Wikipedia
- Defence Day or Army Day (Pakistan) Wikipedia
- Flag Day (Bonaire) Wikipedia
- Independence Day (Swaziland), celebrates the independence of Eswatini from the United Kingdom in 1968 Wikipedia
- Unification Day (Bulgaria) Wikipedia
Religious feast days
- Christian feast days: Begga Wikipedia
- Christian feast days: Chagnoald Wikipedia
- Christian feast days: Faustus, Abibus and Dionysius of Alexandria Wikipedia
- Christian feast days: Gondulphus of Metz Wikipedia
- Christian feast days: Blessed Jan Franciszek Czartoryski Wikipedia
- Christian feast days: Magnus of Füssen Wikipedia
- Christian feast days: Onesiphorus Wikipedia
- Christian feast days: Zechariah (Hebrew prophet) (Catholic church) Wikipedia
- Christian feast days: September 6 (Eastern Orthodox liturgics) Wikipedia
September 7
National and local
Religious feast days
- Anastasius the Fuller Wikipedia
- Clodoald Wikipedia
- Blessed Giovanni Battista Mazzucconi Wikipedia
- Gratus of Aosta Wikipedia
- Stephen Pongracz Wikipedia
- Blessed Maria Angela Picco Wikipedia
- Marko Krizin Wikipedia
- Regina Wikipedia
- Blessed Thomas Tsugi Wikipedia
- September 7 (Eastern Orthodox liturgics) Wikipedia
September 8
International
National and local
Religious feast days
- Adrian and Natalia of Nicomedia (Roman Catholic Church) Wikipedia
- Corbinian Wikipedia
- Disibod Wikipedia
- Blessed Frédéric Ozanam Wikipedia
- Isaac of Armenia Wikipedia
- Nativity of Mary (Roman Catholic Church), (Anglo-Catholicism) Monti Fest (Mangalorean Catholic) Wikipedia
- Our Lady of Charity Wikipedia
- Our Lady of Covadonga (national holiday in Asturias) Wikipedia
- Our Lady of Good Health of Vailankanni Wikipedia
- Pope Sergius I Wikipedia
- September 8 (Eastern Orthodox liturgics) Wikipedia
- Feast Day of Our Lady of Meritxell (national holiday in Andorra) Wikipedia
- National Day (Andorra), also the feast of Our Lady of Meritxell Wikipedia
- National Day (Asturias), also the feast of Our Lady of Covadonga Wikipedia
- National Day (Extremadura), also the feast of Our Lady of Guadalupe Wikipedia
- Victory Day, also the feast of Our Lady of Victories or il-Vittorja (Malta) Wikipedia
September 9
International
- International Buy-a-Priest-a-Beer Day Wikipedia
National and local
- Armored Forces Day (Ukraine) Wikipedia
- California Admission Day (California, United States) Wikipedia
- Children's Day (Costa Rica) Wikipedia
- Chrysanthemum Day or Kiku no Sekku (Japan) Wikipedia
- Day of the Victims of Holocaust and of Racial Violence (Slovakia) Wikipedia
- Emergency Services Day (United Kingdom) Wikipedia
- Independence Day or Republic Day, celebrates the proclamation of Democratic People's Republic of Korea (North Korea) in 1948 Wikipedia
- Independence Day (Tajikistan), celebrates the independence of Tajikistan from USSR in 1991 Wikipedia
- Martyrs' Day (Afghanistan) (date may fall on September 8, follows a non-Gregorian calendar, see List of observances set by the Solar Hijri calendar) Wikipedia
- Remembrance for Herman the Cheruscan (The Troth) Wikipedia
Religious feast days
- Charles Lowder (Church of England) Wikipedia
- Ciarán of Clonmacnoise Wikipedia
- Blessed Euthymia Üffing Wikipedia
- Blessed Francisco Gárate Aranguren Wikipedia
- Constance, Nun, and her Companions (Episcopal Church) Wikipedia
- Blessed Maria Torribia Wikipedia
- Our Lady of Arantzazu (Oñati, Spain; Philippines Wikipedia
- Peter Claver Wikipedia
- Synaxis of Ss. Joachim and Anna, an Afterfeast. (Eastern Orthodox and Eastern Catholic Churches) Wikipedia
- September 9 (Eastern Orthodox liturgics) Wikipedia
September 10
International
- World Suicide Prevention Day Wikipedia
National and local
Religious feast days
- Alexander Crummell (Episcopal Church) Wikipedia
- Ambrose Barlow Wikipedia
- Aubert Wikipedia
- Blessed Sebastian Kimura, Charles Spinola, and Martyrs of Nagasaki Wikipedia
- Edmund James Peck (Anglican Church of Canada) Wikipedia
- Nicholas of Tolentino Wikipedia
- Theodard of Maastricht Wikipedia
- September 10 (Eastern Orthodox liturgics) Wikipedia
September 11
National and local
- Battle of Tendra Day (Russia) Wikipedia
- Death Anniversary of Quaid-e-Azam Muhammad Ali Jinnah (Pakistan) Wikipedia
- Emergency Number Day (United States) Wikipedia
- Enkutatash falls on this day if it is not a leap year. Celebrated on the first day of Mäskäräm. (Ethiopia, Eritrea, Rastafari) Wikipedia
- National Day (Catalonia) Wikipedia
- Nayrouz (Coptic Orthodox Church), September 12 on leap years Wikipedia
- September 11 attacks-related observances (United States): National Day of Service and Remembrance Wikipedia
- September 11 attacks-related observances (United States): Patriot Day Wikipedia
- Teachers' Day (Argentina) Wikipedia
Religious feast days
- Christian feast days: Blessed Francesco Bonifacio Wikipedia
- Christian feast days: Blessed Bonaventura Gran Wikipedia
- Christian feast days: Deiniol Wikipedia
- Christian feast days: Felix, Regula, and Exuperantius Wikipedia
- Christian feast days: Harry Burleigh (Episcopal Church) Wikipedia
- Christian feast days: John Gabriel Perboyre (one of Martyr Saints of China) Wikipedia
- Christian feast days: Leudinus (Bobo) Wikipedia
- Christian feast days: Our Lady of Coromoto Wikipedia
- Christian feast days: Paphnutius of Thebes (Roman Catholic Church) Wikipedia
- Christian feast days: Patiens of Lyon Wikipedia
- Christian feast days: Protus and Hyacinth Wikipedia
- Christian feast days: Sperandia Wikipedia
- Christian feast days: Theodora of Alexandria Wikipedia
- Christian feast days: September 11 (Eastern Orthodox liturgics) Wikipedia
September 12
International
- United Nations Day for South–South Cooperation (International) Wikipedia
National and local
- Commemoration of the mass hanging of the Saint Patrick's Battalion (Mexico) Wikipedia
- Day of Conception (Russia) Wikipedia
- Defenders Day (Maryland, United States) Wikipedia
- Enkutatash falls on this day if it is a leap year. Celebrated on the first day of Mäskäräm. (Ethiopia, Eritrea, Rastafari) Wikipedia
- Nayrouz (Coptic Orthodox Church) (leap years only, September 11 on normal years) Wikipedia
- National Day (Cape Verde) Wikipedia
- National Day of Encouragement (United States) Wikipedia
- Saragarhi Day (Sikhism) Wikipedia
Religious feast days
- Ailbe (Elvis, Eilfyw) of Emly Wikipedia
- Guy of Anderlecht Wikipedia
- The Most Holy Name of the Blessed Virgin Mary Wikipedia
- John Henry Hobart (Episcopal Church (USA)) Wikipedia
- Laisrén mac Nad Froích Wikipedia
- Sacerdos of Lyon Wikipedia
- Blessed Thomas of Zumárraga Wikipedia
- September 12 (Eastern Orthodox liturgics) Wikipedia
September 13
National and local
Religious feast days
- Feast of the Cross (Assyrian Church of the East) Wikipedia
- Aimé (Amatus) Wikipedia
- Amé (Amatus) of Remiremont Wikipedia
- John Chrysostom Wikipedia
- Marcellinus of Carthage Wikipedia
- Blessed María López de Rivas Martínez Wikipedia
- Maurilius (Maurille) of Angers Wikipedia
- Nectarius of Autun Wikipedia
- Venerius the Hermit Wikipedia
- Wulfthryth (Wilfrida) of Wilton Wikipedia
- September 13 (Eastern Orthodox liturgics) Wikipedia
September 14
National and local
Religious feast days
- Aelia Flaccilla (Eastern Orthodox Church) Wikipedia
- Albert of Vercelli Wikipedia
- Cormac mac Cuilennáin (or of Cashel) Wikipedia
- Crescentius of Rome Wikipedia
- Feast of the Cross (Christianity) Elevation of the Holy Cross (Eastern Orthodox) Wikipedia
- Lord of Miracles of Buga Wikipedia
- Gabriel-Taurin Dufresse (one of the Martyr Saints of China) Wikipedia
- Maternus of Cologne Wikipedia
- Notburga Wikipedia
- September 14 (Eastern Orthodox liturgics) Wikipedia
September 15
International
National and local
- Battle of Britain Day (United Kingdom) Wikipedia
- Cry of Dolores, celebrated on the eve of Independence Day (Mexico) Wikipedia
- The beginning of German American Heritage Month, celebrated until October 15 Wikipedia
- The beginning of National Hispanic Heritage Month, celebrated until October 15 (United States) Wikipedia
Religious feast days
- Joseph Abibos Wikipedia
- Alpinus (Albinus) of Lyon Wikipedia
- Aprus (Èvre) of Toul Wikipedia
- Blessed Camillus Costanzo Wikipedia
- Catherine of Genoa Wikipedia
- James Chisholm (Episcopal Church) Wikipedia
- Saint Dominic in Soriano (formerly) Wikipedia
- Mamilian of Palermo Wikipedia
- Mirin Wikipedia
- Nicetas the Goth Wikipedia
- Nicomedes Wikipedia
- Our Lady of Sorrows Wikipedia
- September 15 (Eastern Orthodox liturgics) Wikipedia
September 16
International
- International Day for the Preservation of the Ozone Layer Wikipedia
National and local
- Cry of Dolores, celebrates the declaration of independence of Mexico from Spain in 1810. See Fiestas Patrias Wikipedia
- Independence Day (Papua New Guinea), celebrates the independence of Papua New Guinea from Australia in 1975 Wikipedia
- Malaysian Armed Forces Day (Malaysia) Wikipedia
- Malaysia Day (Malaysia) Wikipedia
- Martyrs' Day (Libya) Wikipedia
- National Heroes Day (Saint Kitts and Nevis) Wikipedia
Religious feast days
September 17
National and local
- Australian Citizenship Day Wikipedia
- Constitution Day and Citizenship Day, observed on the previous Friday if it falls on a Saturday, the following Monday if on a Sunday; and the beginning of the Constitution Week (United States) Wikipedia
- Heroes' Day (Angola) Wikipedia
- Marathwada Liberation Day (Maharashtra) Wikipedia
- National Unity Day (Belarus) (since 2021) Wikipedia
- Operation Market Garden Anniversary is still remembered with parachuting and dedications on this day. (Netherlands) Wikipedia
Religious feast days
- Albert of Vercelli Wikipedia
- Ariadne of Phrygia Wikipedia
- Blessed Cecilia Eusepi Wikipedia
- Stanislaus Papczyński Wikipedia
- Hildegard of Bingen Wikipedia
- Lambert Wikipedia
- Robert Bellarmine Wikipedia
- Satyrus of Milan Wikipedia
- Socrates and Stephen Wikipedia
- Zygmunt Szczęsny Feliński Wikipedia
- September 17 (Eastern Orthodox liturgics) Wikipedia
September 18
September 19
International
- International Talk Like a Pirate Day Wikipedia
National and local
Religious feast days
- Alonso de Orozco Mena Wikipedia
- Emilie de Rodat Wikipedia
- Blessed Francisca Cualladó Baixauli Wikipedia
- Goeric of Metz Wikipedia
- Januarius (Western Christianity) Feast of San Gennaro Wikipedia
- Maria de Cervelló Wikipedia
- Our Lady of La Salette Wikipedia
- Theodore of Tarsus (Anglican Communion, Roman Catholic Church, Eastern Orthodox Church) Wikipedia
- Trophimus, Sabbatius, and Dorymedon Wikipedia
- September 19 (Eastern Orthodox liturgics) Wikipedia
September 20
International
- Universal Children's Day (Germany) Wikipedia
National and local
Religious feast days
- Eustace (Western Christianity) Wikipedia
- Evilasius Wikipedia
- Fausta of Cyzicus Wikipedia
- Glycerius of Milan Wikipedia
- Jean-Charles Cornay (one of Vietnamese Martyrs) Wikipedia
- John Coleridge Patteson (commemoration, Anglicanism) Wikipedia
- José Maria de Yermo y Parres Wikipedia
- Korean Martyrs, including Andrew Kim Taegon and Laurent-Marie-Joseph Imbert Wikipedia
- Theodore, Philippa and companions Wikipedia
- Blessed Thomas Johnson Wikipedia
- Vincent Madelgarius (Maelceadar) Wikipedia
- September 20 (Eastern Orthodox liturgics) Wikipedia
September 21
International
- International Day of Peace (International) Wikipedia
National and local
- Autumnal equinox observances in the Northern Hemisphere, vernal equinox observances in the Southern Hemisphere (see September 22): Spring Day (Argentina) Wikipedia
- Arbor Day (Brazil) Wikipedia
- Commemoration of the Declaration of Martial Law (Philippines) Wikipedia
- Customs Service Day (Poland) Wikipedia
- Founder's Day and National Volunteer Day (Ghana) Wikipedia
- Independence Day, celebrates the independence of Armenia from the Soviet Union in 1991 Wikipedia
- Independence Day, celebrates the independence of Belize from the United Kingdom in 1981 Wikipedia
- Independence Day, celebrates the independence of Malta from the United Kingdom in 1964 Wikipedia
- Student's Day (Bolivia) Wikipedia
- Victory over the Golden Horde in the Battle of Kulikovo (Russia) Wikipedia
Religious feast days
- Cadoc Wikipedia
- Ephigenia of Ethiopia Wikipedia
- Laurent-Joseph-Marius Imbert (one of the Korean Martyrs) Wikipedia
- Matthew the Evangelist (Western Church) Wikipedia
- Maura of Troyes Wikipedia
- Nativity of the Theotokos (Eastern Orthodox Church, Julian calendar) Wikipedia
- September 21 (Eastern Orthodox liturgics) Wikipedia
September 22
National and local
- American Business Women's Day (United States) Wikipedia
- Baltic Unity Day (Lithuania, Latvia) Wikipedia
- Earliest date for the autumnal equinox in the Northern Hemisphere and the vernal equinox in the Southern Hemisphere: Autumnal Equinox Day (Japan) Wikipedia
- Earliest date for the autumnal equinox in the Northern Hemisphere and the vernal equinox in the Southern Hemisphere: Mabon in the Northern Hemisphere, Ostara in the Southern Hemisphere. (Neopagan Wheel of the Year) Wikipedia
- Earliest date for the autumnal equinox in the Northern Hemisphere and the vernal equinox in the Southern Hemisphere: The first day of Miķeļi (Latvia) Wikipedia
- Independence Day, celebrates the independence of Bulgaria from the Ottoman Empire in 1908 Wikipedia
- Independence Day, celebrates the independence of Mali from France in 1960 Wikipedia
- Resistance Fighting Day (Estonia) Wikipedia
Religious feast days
- Christian feast days: Digna and Emerita Wikipedia
- Christian feast days: Emmeram of Regensburg Wikipedia
- Christian feast days: Felix and Constantia Wikipedia
- Christian feast days: Ignatius of Santhià (Lorenzo Maurizio Belvisotti) Wikipedia
- Christian feast days: Laud of Coutances Wikipedia
- Christian feast days: Paul Chong Hasang (one of The Korean Martyrs) Wikipedia
- Christian feast days: Phocas (the Gardener, or of Sinope) Wikipedia
- Christian feast days: Phocas, Bishop of Sinope Wikipedia
- Christian feast days: Sadalberga Wikipedia
- Christian feast days: Septimius of Iesi (this date since 1623) Wikipedia
- Christian feast days: Theban Legion, including: Candidus Wikipedia
- Christian feast days: Theban Legion, including: Maurice (Western Christianity) Wikipedia
- Christian feast days: Philander Chase (Episcopal Church) Wikipedia
- Christian feast days: September 22 (Eastern Orthodox liturgics) Wikipedia
September 23
International
- International Day of Sign Languages Wikipedia
National and local
Religious feast days
- Adomnán Wikipedia
- Blessed Bernardyna Maria Jabłońska Wikipedia
- Cissa of Crowland (or of Northumbria) Wikipedia
- Blessed Elena Duglioli Wikipedia
- Elisabeth and Zechariah Wikipedia
- Blessed Émilie Gamelin Wikipedia
- Blessed Francisco de Paula Victor Wikipedia
- Padre Pio Wikipedia
- Pope Linus Wikipedia
- Sossius Wikipedia
- Thecla (Roman Catholic Church) Wikipedia
- September 23 (Eastern Orthodox liturgics) Wikipedia
September 24
National and local
- Armed Forces Day (Peru) Wikipedia
- Constitution Day (Cambodia) Wikipedia
- Heritage Day (South Africa) Wikipedia
- Independence Day, celebrates the independence of Guinea-Bissau from Portugal in 1973 Wikipedia
- Mahidol Day (Thailand) Wikipedia
- New Caledonia Day (New Caledonia) Wikipedia
- Republic Day (Trinidad and Tobago) Wikipedia
Religious feast days
- Anathalon (in Brescia) Wikipedia
- Antonio Gonzalez Wikipedia
- Blessed Anton Martin Slomšek Wikipedia
- Bystrík Wikipedia
- Blessed Colomba Gabriel Wikipedia
- Blessed Émilie Gamelin (Canada) Wikipedia
- Gerard of Csanád Wikipedia
- Our Lady of Mercy and its related observance: La Mercè (Barcelona) Wikipedia
- Our Lady of Ransom (Mercedarians) Wikipedia
- Our Lady of Walsingham (Church of England) Wikipedia
- Pacificus of San Severino Wikipedia
- Rupert of Salzburg Wikipedia
- Blessed William Spenser Wikipedia
- September 24 (Eastern Orthodox liturgics) Wikipedia
September 25
National and local
Religious feast days
- Abadir and Iraja and Companions (Coptic Church) Wikipedia
- Aunarius (Aunacharius) Wikipedia
- Anathalon (Archdiocese of Milan) Wikipedia
- Cadoc Wikipedia
- Ceolfrith Wikipedia
- Cleopas Wikipedia
- Euphrosyne of Alexandria Wikipedia
- Finbarr Wikipedia
- Fermin of Amiens Wikipedia
- Lancelot Andrewes (Church of England) Wikipedia
- Sergius of Radonezh (repose) Wikipedia
- September 25 (Eastern Orthodox liturgics) Wikipedia
September 26
International
- International Day for the Total Elimination of Nuclear Weapons Wikipedia
National and local
Religious feast days
- Christian feast days: Canadian Martyrs (Catholic Church in Canada) Wikipedia
- Christian feast days: Cosmas and Damian Wikipedia
- Christian feast days: Blessed Crescencia Valls Espí Wikipedia
- Christian feast days: John of Meda Wikipedia
- Christian feast days: Blessed Kaspar Stanggassinger Wikipedia
- Christian feast days: Blessed Luigi Tezza Wikipedia
- Christian feast days: Nilus the Younger Wikipedia
- Christian feast days: Thérèse Couderc Wikipedia
- Christian feast days: Wilson Carlile (Anglican) Wikipedia
- Christian feast days: September 26 (Eastern Orthodox liturgics) Wikipedia
September 27
International
- World Tourism Day (International) Wikipedia
National and local
- Consumación de la Independencia (Mexico) Wikipedia
- French Community Holiday (French community of Belgium) Wikipedia
- Independence Day (Turkmenistan), celebrates the independence of Turkmenistan from USSR in 1991 Wikipedia
- Meskel (Ethiopian and Eritrean Orthodox Church, following Julian calendar, September 28 on leap years) Wikipedia
- National Gay Men's HIV/AIDS Awareness Day (United States) Wikipedia
- Polish Underground State's Day (Poland) Wikipedia
Religious feast days
- Christian feast days: Adheritus Wikipedia
- Christian feast days: Bonfilius Wikipedia
- Christian feast days: Caius of Milan Wikipedia
- Christian feast days: Hiltrude of Liessies Wikipedia
- Christian feast days: Vincent de Paul Wikipedia
- Christian feast days: Cosmas and Damian Wikipedia
- Christian feast days: September 27 (Eastern Orthodox liturgics) Wikipedia
September 28
International
National and local
Religious feast days
- Aaron of Auxerre Wikipedia
- Amalia Abad Casasempere Wikipedia
- Annemund Wikipedia
- Chariton the Confessor Wikipedia
- Conval Wikipedia
- Eustochium Wikipedia
- Exuperius Wikipedia
- Faustus of Riez Wikipedia
- Leoba Wikipedia
- Lorenzo Ruiz Wikipedia
- Nykyta Budka Wikipedia
- Paternus of Auch Wikipedia
- Richard Rolle, Walter Hilton and Margery Kempe (Episcopal Church (USA)) Wikipedia
- Simón de Rojas Wikipedia
- Wenceslas Wikipedia
- September 28 (Eastern Orthodox liturgics) Wikipedia
September 29
Religious feast days
- Charles, Duke of Brittany Wikipedia
- Cyriacus the Anchorite Wikipedia
- Hripsime Wikipedia
- Blessed Francesc de Paula Castelló Aleu Wikipedia
- Guillaume Courtet Wikipedia
- Jean de Montmirail Wikipedia
- John of Dukla Wikipedia
- René Goupil Wikipedia
- Theodota of Philippi Wikipedia
- September 29 (Eastern Orthodox liturgics) Wikipedia
- the Archangels Michael, Gabriel, and Raphael. One of the four quarter days in the Irish calendar. (England and Ireland). Called Michaelmas in some western liturgical traditions Wikipedia
September 30
International
- International Translation Day (International Federation of Translators) Wikipedia
National and local
- Agricultural Reform (Nationalization) Day (São Tomé and Príncipe) Wikipedia
- Birth of Morelos (Mexico) Wikipedia
- Blasphemy Day, educates individuals and groups about blasphemy laws and defends freedom of expression Wikipedia
- Boy's Day (Poland) Wikipedia
- Independence Day (Botswana) or Botswana Day, celebrates the independence of Botswana from United Kingdom in 1966 Wikipedia
- National Day for Truth and Reconciliation or Orange Shirt Day (Canada) Wikipedia