June 1, 2015
- Australia
- Reconciliation Day (ACT)
- Western Australia Day (WA)
- Cook Islands
- Queen's Birthday
- China
- Children's Day
- Cape Verde
- Children's Day
- Greece
- Whit Monday
- Indonesia
- Pancasila Day
- Ireland
- First Monday in June
- Kenya
- Madaraka Day
- Malaysia
- Yang di-Pertuan Agong's Birthday
- Gawai Dayak (13)
- Nicaragua
- Children's Day
- New Zealand
- Queen's Birthday
- Romania
- Children's Day
- Whit Monday
- Singapore
- Vesak Day
- Ukraine
- Pentecost
- United States of America
- Jefferson Davis' birthday
- Cambodia
- International Children Day
- Laos
- International Children Day
June 4, 2015
- Austria
- Corpus Christi
- Bosnia and Herzegovina
- Corpus Christi
- Bolivia
- Corpus Christi
- Switzerland
- Corpus Christi
- Germany
- Corpus Christi
- Dominican Republic
- Corpus Christi
- Spain
- Corpus Christi
- Grenada
- Corpus Christi
- Republic of Equatorial Guinea
- Corpus Christi
- Croatia
- Corpus Christi
- Haiti
- Corpus Christi
- Iran
- Imam Khomeini's Demise
- St. Lucia
- Corpus Christi
- Lichtenstein
- Corpus Christi
- Monaco
- Corpus Christi
- Poland
- Corpus Christi
- Portugal
- Corpus Christi
- Seychelles
- Corpus Christi
- San Marino
- Corpus Christi
- Trinidad & Tobago
- Corpus Christi
- Timor Leste
- Corpus Christi
June 5, 2015
- Bahamas
- Randol Fawkes Labour Day
- Republic of Equatorial Guinea
- President's Day
- Iran
- Revolt of Khordad 15
- Lichtenstein
- Feiertagsbrücke
- Faroe Islands
- Constitution Day
June 6, 2015
- South Korea
- Memorial Day
- Sweden
- National Day
June 8, 2015
- Anguilla
- Celebration of the Birthday of Her Majesty the Queen
- Australia
- Queen's Birthday
- Colombia
- Corpus Christi
- Tonga
- Emancipation Day
- Papua New Guinea
- Queen Elizabeth II's Birthday
June 9, 2015
- Ã…land Islands
- Autonomy Day
- Western Sahara
- Day of the Martyrs
- Uganda
- National Heroes Day
June 10, 2015
- Republic of the Congo
- Fête de la commémoration de la conférence nationale souveraine
- France
- Abolition of Slavery
- French Guiana
- Abolition of Slavery
- Portugal
- Portugal Day
June 11, 2015
- United States of America
- Kamehameha Day
June 12, 2015
- Isle of Man
- Tourist Trophy, Senior Race Day
- Nigeria
- M.K.O Abiola Day
- Philippines
- Independence Day
- Paraguay
- Chaco Armistice
- Russia
- Russia Day
June 13, 2015
- British Virgin Islands
- Sovereign’s Birthday
June 14, 2015
- United States of America
- Flag Day
June 15, 2015
- Azerbaijan
- National Salvation Day
- Bermuda
- National Heroes Day
- Brazil
- Aniversário do estado
- Colombia
- Sacred Heart
- Gibraltar
- Queen's Birthday
- Montserrat
- Queen's Birthday Celebration
- Turks & Caicos Islands
- Queen's Birthday
June 16, 2015
- South Africa
- Youth Day
June 17, 2015
- Western Sahara
- Day of National Unity
- Iceland
- Icelandic National Day
- United States of America
- Bunker Hill Day
June 18, 2015
- Brazil
- Dia do evangélico
- Seychelles
- National Holiday
- Cambodia
- HM Queen Norodom Monineath Sihanouk the Queen-Mother's Birthday
- United Arab Emirates
- First day of Ramadan
- Brunei
- First day of Ramadan
- Ethiopia
- First day of Ramadan
- Malaysia
- First day of Ramadan
June 19, 2015
- Trinidad & Tobago
- Labour Day
June 20, 2015
- Argentina
- National Flag Day
- Ã…land Islands
- Midsummer Day
- China
- Dragon Boat Festival
- Eritrea
- Martyrs' Day
- Finland
- Midsummer Day
- Hong Kong
- Dragon Boat Festival
- Sweden
- Midsummer Day
- Taiwan
- Dragon Boat Festival
- United States of America
- West Virginia Day
June 21, 2015
- Bolivia
- Andean Amazonian Chaqueño New Year
- Canada
- National Indigenous Peoples Day (NT)
- Greenland
- National Day
- Malaysia
- Sultan of Kedah's Birthday
- Togolese Republic
- Day of the Martyrs
- Pakistan
- June Solstice
- Papua New Guinea
- June Solstice
June 23, 2015
- Switzerland
- Jura Plebiscite
- Estonia
- Victory Day
- Luxembourg
- National Holiday
- Latvia
- Midsummer Eve
June 25, 2015
- Croatia
- Statehood Day
- Mozambique
- Independence Day
- Slovenia
- Statehood Day
June 26, 2015
- Azerbaijan
- Azerbaijan Armed Forces Day
- Madagascar
- Independence Day
- Somalia
- Independence of British Somaliland
June 27, 2015
- Djibouti
- Independence Day
June 29, 2015
- Brazil
- São Pedro
- Switzerland
- Saints Peter and Paul
- Chile
- Saints Peter and Paul
- Colombia
- Saints Peter and Paul
- Spain
- DÃa de las Instituciones de Cantabria
- Guatemala
- Army Day
- Malta
- Saints Peter and Paul
- Peru
- Saints Peter and Paul
- Seychelles
- Independence Day
- Ukraine
- Constitution Day (substitute day)
- Vatican City
- Saints Peter and Paul
- British Virgin Islands
- Virgin Islands Day
June 30, 2015
- Democratic Republic of the Congo
- Independence Day
- Central African Republic
- General Prayer Day
- Egypt
- 30 June Day
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