October 1, 2031
China- National Day
- Mid-Autumn Festival
Cyprus- Cyprus Independence Day
Hong Kong- National Day
South Korea- Korean Thanksgiving
Nigeria- Independence Day
San Marino- Cerimonia di investitura dei Capitani Reggenti
Taiwan- Mid-Autumn Festival
Ukraine- Defenders of Ukraine Day
Uzbekistan- Teachers and Instructors Day
October 3, 2031
Brazil- Mártires de Cunhaú e Uruaçu
- China
- National Day
Germany- National Holiday
Honduras- Soldier's Day
- South Korea
- National Foundation Day
October 4, 2031
Lesotho- Independence Day
Malaysia- Sabah State Governor's Birthday
Mozambique- Peace and Reconciliation Day
October 5, 2031
- Brazil
- Criação do estado
Spain- Nuestra Señora de Guadalupe
Canary Islands- Nuestra Señora de Guadalupe
Portugal- Implantação da República
Vanuatu- Constitution Day
October 6, 2031
Australia- Labour Day (SA)
- King's Birthday (QLD)
Christmas Island- Territory Day
Egypt- Armed Forces Day
St. Lucia- Thanksgiving
October 8, 2031
People's Republic of Bangladesh- Durga Puja
Peru- Battle of Angamos
October 9, 2031
St. Barths- Abolition of Slavery
France- Abolition of Slavery
- South Korea
- Hangul Day
Sint Maarten- Constitution Day
Uganda- Independence Day
Israel- Simchat Torah/ Shmini Atzeret
October 12, 2031
- Brazil
- Our Lady of Aparecida
Bahamas- National Heroes' Day
Chile- Columbus Day
Costa Rica- Columbus Day
- Spain
- Fiesta Nacional de España
Republic of Equatorial Guinea- Independence Day
- Honduras
- Columbus Day
- Canary Islands
- Fiesta Nacional de España
Nicaragua- Indigenous Resistance Day
Venezuela- Day of Indigenous Resistance
October 13, 2031
Argentina- Day of Respect for Cultural Diversity
American Samoa- Columbus Day
Burundi- Rwagasore Day
- Bahamas
- National Heroes' Day (substitute day)
Belize- Day of the Americas
Canada- Thanksgiving
Colombia- Columbus Day
- Republic of Equatorial Guinea
- Independence Day (substitute day)
Guam- Columbus Day
Japan- Sports Day
Puerto Rico- Columbus Day
Turks & Caicos Islands- National Heritage Day
Thailand- King Bhumibol Adulyadej Memorial Day
United States of America- Columbus Day
- Indigenous Peoples' Day (VT)
- Native American Day (SD)
U.S. Virgin Islands- Virgin Islands–Puerto Rico Friendship Day
October 16, 2031
Cambodia- Pchum Ben Day
October 17, 2031
Haiti- Anniversary of the death of Dessalines
October 18, 2031
Azerbaijan- Independence Day
- United States of America
- Alaska Day
October 20, 2031
Albania- Mother Teresa Day (substitute day)
- Azerbaijan
- Independence Day (substitute day)
Guatemala- Revolution Day
Jamaica- National Heroes Day
Kenya- Mashujaa Day
British Virgin Islands- St. Ursula’s Day
October 24, 2031
- Hong Kong
- Chung Yeung Festival
New Zealand- Provincial anniversary day
- Venezuela
- Natalicio de Rafael Urdaneta
Zambia- Independence Day
October 25, 2031
Grenada- Thanksgiving Day
Kazakhstan- Republic Day
October 26, 2031
Austria- National Holiday
Cook Islands- National Gospel Day
October 27, 2031
- Cook Islands
- National Gospel Day (substitute day)
Ireland- October Bank Holiday
- New Zealand
- Labour Day
St. Vincent & Grenadines- Independence Day
- Kazakhstan
- Republic Day (observed)
October 28, 2031
- Cyprus
- National Holiday
Czech Republic- Independent Czechoslovak State Day
Greece- National Holiday
October 31, 2031
- Chile
- Reformation Day
- Germany
- Reformation Day
Slovenia- Reformation Day
- United States of America
- Nevada Day (NV)
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