September 1, 2037
Eritrea- Revolution Day
Slovakia- Constitution Day
Uzbekistan- Independence Day
September 3, 2037
San Marino- The Feast of San Marino and the Republic
September 5, 2037
Brazil- Dia da Amazônia (AC)
- Elevação do Amazonas à categoria de provÃncia (AM)
September 6, 2037
Bulgaria- Unification Day
Caribbean Netherlands- Bonaire Day
São Tomé & PrÃncipe- Armed Forces Day
Swaziland- Independence Day
September 7, 2037
American Samoa- Labour Day
Bermuda- Labour Day
- Brazil
- Independence Day
Canada- Labour Day
Spain- La Bajada de la Virgen del Socorro
Fiji- Constitution Day
Guam- Labour Day
Canary Islands- La Bajada de la Virgen del Socorro
Mozambique- Lusaka Peace Agreement
Puerto Rico- Labour Day
- São Tomé & PrÃncipe
- Armed Forces Day (substitute day)
- Swaziland
- Umhlanga Reed Dance
- Independence Day (substitute day)
United States of America- Labour Day
U.S. Virgin Islands- Labour Day
Jordan- Isra' and Mi'raj (estimated)
Kuwait- Isra' and Mi'raj (estimated)
United Arab Emirates- Laylat al-Mi'raj
Brunei- Laylat al-Mi'raj
Djibouti- Laylat al-Mi'raj
Indonesia- Laylat al-Mi'raj
Iran- Mabaas of Muhammad
Comoros- Laylat al-Mi'raj
Malaysia- Laylat al-Mi'raj
Somalia- Laylat al-Mi'raj
September 8, 2037
Andorra- Our Lady of Meritxell
- Brazil
- Nossa Senhora da Luz dos Pinhais (PR)
- Nossa Senhora da Natividade (TO)
- Spain
- DÃa de Asturias (AS)
- Nuestra Señora del Pino (CN)
- DÃa de Extremadura (EX)
- Canary Islands
- Nuestra Señora del Pino
Lichtenstein- Mariä Geburt
Macedonia- Independence Day
Malta- Victory Day
- United States of America
- Primary Election Day
Vatican City- Nativity of Mary
September 10, 2037
Belize- Saint George's Caye Day, National Day
Switzerland- Jeûne Genevois
Ecuador- Independence of Guayaquil
Gibraltar- Gibraltar National Day
Israel- Rosh Hashanah (Yom Teruah)
September 12, 2037
Cape Verde- National Day
September 13, 2037
- Brazil
- Criação do Território Federal
September 15, 2037
Costa Rica- Independence Day
- Spain
- La Bien Aparecida (CB)
- Nuestra Señora de los Dolores (CN)
Guatemala- Independence Day
Honduras- Independence Day
- Canary Islands
- Nuestra Señora de los Dolores
Nicaragua- Independence Day
- Slovakia
- Day of Our Lady of the Seven Sorrows
El Salvador- Independence Day
September 16, 2037
- Brazil
- Emancipação polÃtica
St. Kitts & Nevis- National Heroes' Day
Libya- Martyrs' Day
Mexico- Independence Day
- Malaysia
- Malaysia Day
Papua New Guinea- Independence Day
September 17, 2037
Angola- National Hero Day
September 18, 2037
Chile- National holiday
- Spain
- Nuestra Señora de la Peña
- Canary Islands
- Nuestra Señora de la Peña
September 19, 2037
- Chile
- Army Day
- St. Kitts & Nevis
- Independence Day
- Israel
- Day of Atonement (Yom Kippur)
Montenegro- Yom Kippur
September 20, 2037
- Brazil
- Proclamação da República Rio-Grandense
- Switzerland
- Federal Day of Thanksgiving, Repentance and Prayer
Germany- International Children's Day
September 22, 2037
- Bulgaria
- Independence Day
- Switzerland
- Mauritiustag
Japan- Citizens' Holiday
Republic of Mali- Independence Day
- Papua New Guinea
- September Equinox
September 23, 2037
- Japan
- Autumnal Equinox Day
Saudi Arabia- National Day Holiday
September 24, 2037
Austria- Rupert
Bolivia- Pando Day (N)
- Santa Cruz Day (S)
China- Mid-Autumn Festival
Dominican Republic- Our Lady of las Mercedes
- Spain
- Nuestra Señora de los Reyes (CN)
- Mare de Déu de la Mercè (CT)
Guinea-Bissau- Independence Day
- Canary Islands
- Nuestra Señora de los Reyes
South Korea- Korean Thanksgiving
New Caledonia- New Caledonia Day
Trinidad & Tobago- Republic Day
Taiwan- Mid-Autumn Festival
South Africa- Heritage Day
Cambodia- Constitution Day
- Israel
- Feast of Tabernacles (Sukkot)
September 25, 2037
Australia- AFL Grand Final Friday
- Switzerland
- Saint Nicholas of Flüe
Hong Kong- The day following the Chinese Mid-Autumn Festival
- Mozambique
- Defense Force’s Day
Turks & Caicos Islands- National Youth Day
- Iran
- Birthday of Imam Mahdi
September 28, 2037
- Australia
- King's Birthday
Czech Republic- St. Wenceslas Day (Czech Statehood Day)
September 29, 2037
Paraguay- Boqueron Battle Victory Day
September 30, 2037
Botswana- Botswana Day
- Canada
- National Day for Truth and Reconciliation
- São Tomé & PrÃncipe
- Agricultural Reform Day
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