September 1, 2028
Eritrea- Revolution Day
Slovakia- Constitution Day
Uzbekistan- Independence Day
September 3, 2028
San Marino- The Feast of San Marino and the Republic
September 4, 2028
American Samoa- Labour Day
Bermuda- Labour Day
Canada- Labour Day
Gibraltar- Gibraltar National Day (substitute day)
Guam- Labour Day
Puerto Rico- Labour Day
Swaziland- Umhlanga Reed Dance
United States of America- Labour Day
U.S. Virgin Islands- Labour Day
September 5, 2028
Brazil- Dia da Amazônia (AC)
- Elevação do Amazonas à categoria de provÃncia (AM)
September 6, 2028
Bulgaria- Unification Day
Caribbean Netherlands- Bonaire Day
São Tomé & PrÃncipe- Armed Forces Day
- Swaziland
- Independence Day
September 7, 2028
- Brazil
- Independence Day
Switzerland- Jeûne Genevois
Spain- La Bajada de la Virgen del Socorro
Fiji- Constitution Day
Canary Islands- La Bajada de la Virgen del Socorro
Mozambique- Lusaka Peace Agreement
September 8, 2028
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
Vatican City- Nativity of Mary
September 12, 2028
Cape Verde- National Day
- Eritrea
- Geez New Year
Ethiopia- New Year's Day
- United States of America
- Primary Election Day
September 13, 2028
- Brazil
- Criação do Território Federal
September 15, 2028
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, 2028
- 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, 2028
Angola- National Hero Day
- Switzerland
- Federal Day of Thanksgiving, Repentance and Prayer
Cambodia- Pchum Ben Day
September 19, 2028
Chile- Army Day
- St. Kitts & Nevis
- Independence Day
- Cambodia
- Pchum Ben Day
September 22, 2028
- Bulgaria
- Independence Day
- Switzerland
- Mauritiustag
Japan- Autumnal Equinox Day
Republic of Mali- Independence Day
Israel- Rosh Hashanah (Day 2)
- Papua New Guinea
- September Equinox
September 23, 2028
Saudi Arabia- National Day Holiday
September 24, 2028
Austria- Rupert
Bolivia- Pando Day (N)
- Santa Cruz Day (S)
Dominican Republic- Our Lady of las Mercedes
- Spain
- Nuestra Señora de los Reyes
Guinea-Bissau- Independence Day
- Canary Islands
- Nuestra Señora de los Reyes
New Caledonia- New Caledonia Day
Trinidad & Tobago- Republic Day
South Africa- Heritage Day
- Cambodia
- Constitution Day
- Saudi Arabia
- National Day Holiday (observed)
September 25, 2028
Australia- King's Birthday
- Bolivia
- Pando Day (substitutes) (N)
- Santa Cruz Day (substitutes) (S)
- Switzerland
- Saint Nicholas of Flüe
- Spain
- Mare de Déu de la Mercè
- Mozambique
- Defense Force’s Day
- Trinidad & Tobago
- Republic Day (substitute day)
- South Africa
- Public Holiday
September 28, 2028
Czech Republic- St. Wenceslas Day (Czech Statehood Day)
- Eritrea
- Meskel
- Ethiopia
- Finding of the True Cross
September 29, 2028
- Australia
- AFL Grand Final Friday
Paraguay- Boqueron Battle Victory Day
- São Tomé & PrÃncipe
- Agricultural Reform Day (substitute day)
Turks & Caicos Islands- National Youth Day
September 30, 2028
Botswana- Botswana Day
- Canada
- National Day for Truth and Reconciliation
- São Tomé & PrÃncipe
- Agricultural Reform Day
- Israel
- Day of Atonement (Yom Kippur)
Montenegro- Yom Kippur
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