| Date | Country | Holiday name |
|---|---|---|
| 2031-06-01 |  Andorra | Pentecost |
| 2031-06-01 |  Austria | Pentecost |
| 2031-06-01 |  Barbados | Pentecost |
| 2031-06-01 |  Burkina Faso | Pentecost |
| 2031-06-01 |  Republic of the Congo | Pentecost |
| 2031-06-01 |  Switzerland | Pentecost |
| 2031-06-01 |  China | Children's Day |
| 2031-06-01 |  Cape Verde | Children's Day |
| 2031-06-01 |  Cyprus | Pentecost |
| 2031-06-01 |  Denmark | Pentecost |
| 2031-06-01 |  Estonia | Pentecost |
| 2031-06-01 |  Finland | Pentecost |
| 2031-06-01 |  Faroe Islands | Pentecost |
| 2031-06-01 |  Greenland | Pentecost |
| 2031-06-01 |  Greece | Pentecost |
| 2031-06-01 |  Hungary | Pentecost |
| 2031-06-01 |  Indonesia | Pancasila Day |
| 2031-06-01 |  Iceland | Pentecost |
| 2031-06-01 |  Kenya | Madaraka Day |
| 2031-06-01 |  Malaysia | Gawai Dayak |
| 2031-06-01 |  Nicaragua | Children's Day |
| 2031-06-01 |  Netherlands | Pentecost |
| 2031-06-01 |  Norway | Pentecost |
| 2031-06-01 |  Poland | Pentecost |
| 2031-06-01 |  Romania | Children's Day |
| 2031-06-01 | Romania | Pentecost |
| 2031-06-01 |  Sweden | Pentecost |
| 2031-06-01 |  Slovenia | Pentecost |
| 2031-06-01 |  Svalbard & Jan Mayen | Pentecost |
| 2031-06-01 |  Sint Maarten | Pentecost |
| 2031-06-01 |  Ukraine | Pentecost |
| 2031-06-02 | Andorra | Whit Monday |
| 2031-06-02 |  Antigua & Barbuda | Whit Monday |
| 2031-06-02 |  Anguilla | Whit Monday |
| 2031-06-02 | Austria | Whit Monday |
| 2031-06-02 |  Australia | Reconciliation Day (ACT) |
| 2031-06-02 | Australia | Western Australia Day (WA) |
| 2031-06-02 | Barbados | Whit Monday |
| 2031-06-02 |  Belgium | Whit Monday |
| 2031-06-02 |  Benin | Whit Monday |
| 2031-06-02 |  St. Barths | Whit Monday |
| 2031-06-02 |  Bahamas | Whit Monday |
| 2031-06-02 |  Central African Republic | Whit Monday |
| 2031-06-02 | Republic of the Congo | Whit Monday |
| 2031-06-02 | Switzerland | Whit Monday |
| 2031-06-02 |  Republic of Côte d'Ivoire | Whit Monday |
| 2031-06-02 |  Cook Islands | Queen's Birthday |
| 2031-06-02 |  Germany | Whit Monday |
| 2031-06-02 | Denmark | Whit Monday |
| 2031-06-02 |  Dominica | Whit Monday |
| 2031-06-02 |  Spain | Whit Monday |
| 2031-06-02 | Faroe Islands | Whit Monday |
| 2031-06-02 |  France | Whit Monday |
| 2031-06-02 |  Gabon | Whit Monday |
| 2031-06-02 |  Grenada | Whit Monday |
| 2031-06-02 |  French Guiana | Whit Monday |
| 2031-06-02 | Greenland | Whit Monday |
| 2031-06-02 |  Guadeloupe | Whit Monday |
| 2031-06-02 | Greece | Whit Monday |
| 2031-06-02 | Hungary | Whit Monday |
| 2031-06-02 |  Ireland | First Monday in June |
| 2031-06-02 | Iceland | Whit Monday |
| 2031-06-02 |  Italia | Republic Day |
| 2031-06-02 | Italia | Whit Monday (32) |
| 2031-06-02 | Kenya | Madaraka Day (substitute day) |
| 2031-06-02 |  St. Kitts & Nevis | Whit Monday |
| 2031-06-02 |  St. Lucia | Whit Monday |
| 2031-06-02 |  Lichtenstein | Whit Monday |
| 2031-06-02 |  Luxembourg | Whit Monday |
| 2031-06-02 |  Monaco | Whit Monday |
| 2031-06-02 |  St. Martin | Whit Monday |
| 2031-06-02 |  Madagascar | Whit Monday |
| 2031-06-02 |  Martinique | Whit Monday |
| 2031-06-02 |  Montserrat | Whit Monday |
| 2031-06-02 | Malaysia | Yang di-Pertuan Agong's Birthday |
| 2031-06-02 | Malaysia | Gawai Dayak (13) |
| 2031-06-02 |  New Caledonia | Whit Monday |
| 2031-06-02 | Netherlands | Whit Monday |
| 2031-06-02 | Norway | Whit Monday |
| 2031-06-02 |  New Zealand | King's Birthday |
| 2031-06-02 |  St. Pierre & Miquelon | Whit Monday |
| 2031-06-02 |  Réunion | Whit Monday |
| 2031-06-02 | Romania | Whit Monday |
| 2031-06-02 |  St. Helena | Whit Monday |
| 2031-06-02 | Svalbard & Jan Mayen | Whit Monday |
| 2031-06-02 |  Senegal | Whit Monday |
| 2031-06-02 |  Togolese Republic | Whit Monday |
| 2031-06-02 | Ukraine | Pentecost |
| 2031-06-02 |  United States of America | Jefferson Davis' birthday |
| 2031-06-02 |  St. Vincent & Grenadines | Whit Monday |
| 2031-06-02 |  British Virgin Islands | Whit Monday |
| 2031-06-02 |  Mayotte | Whit Monday |
| 2031-06-03 |  Thailand | Queen Suthida's Birthday |
| 2031-06-03 |  Uganda | Martyr's Day |
| 2031-06-04 |  Iran | Imam Khomeini's Demise |
| 2031-06-04 |  Tonga | Emancipation Day |
| 2031-06-05 |  Republic of Equatorial Guinea | President's Day |
| 2031-06-05 | Iran | Revolt of Khordad 15 |
| 2031-06-05 | Faroe Islands | Constitution Day |
| 2031-06-06 | Bahamas | Randol Fawkes Labour Day |
| 2031-06-06 |  South Korea | Memorial Day |
| 2031-06-06 | Sweden | National Day |
| 2031-06-07 |  Chile | Battle of Arica |
| 2031-06-07 |  Malta | June 7th |
| 2031-06-08 | Senegal | Magal de Touba |
| 2031-06-09 | Anguilla | Celebration of the Birthday of Her Majesty the Queen |
| 2031-06-09 | Australia | King's Birthday |
| 2031-06-09 |  Ã…land Islands | Autonomy Day |
| 2031-06-09 |  Western Sahara | Day of the Martyrs |
| 2031-06-09 | Montserrat | Queen's Birthday Celebration |
| 2031-06-09 |  Turks & Caicos Islands | Queen's Birthday |
| 2031-06-09 | Uganda | National Heroes Day |
| 2031-06-10 | Republic of the Congo | Fête de la commémoration de la conférence nationale souveraine |
| 2031-06-10 | France | Abolition of Slavery |
| 2031-06-10 | French Guiana | Abolition of Slavery |
| 2031-06-10 |  Portugal | Portugal Day |
| 2031-06-10 | Iran | Arbaeen-e Hosseini |
| 2031-06-11 | United States of America | Kamehameha Day |
| 2031-06-12 | Austria | Corpus Christi |
| 2031-06-12 |  Bosnia and Herzegovina | Corpus Christi |
| 2031-06-12 |  Bolivia | Corpus Christi |
| 2031-06-12 | Switzerland | Corpus Christi |
| 2031-06-12 | Germany | Corpus Christi |
| 2031-06-12 |  Dominican Republic | Corpus Christi |
| 2031-06-12 | Spain | Corpus Christi |
| 2031-06-12 | Grenada | Corpus Christi |
| 2031-06-12 | Republic of Equatorial Guinea | Corpus Christi |
| 2031-06-12 |  Croatia | Corpus Christi |
| 2031-06-12 |  Haiti | Corpus Christi |
| 2031-06-12 | St. Lucia | Corpus Christi |
| 2031-06-12 | Lichtenstein | Corpus Christi |
| 2031-06-12 | Monaco | Corpus Christi |
| 2031-06-12 |  Nigeria | Democracy Day |
| 2031-06-12 |  Philippines | Independence Day |
| 2031-06-12 | Poland | Corpus Christi |
| 2031-06-12 | Portugal | Corpus Christi |
| 2031-06-12 |  Paraguay | Chaco Armistice |
| 2031-06-12 |  Russia | Russia Day |
| 2031-06-12 |  Seychelles | Corpus Christi |
| 2031-06-12 |  San Marino | Corpus Christi |
| 2031-06-12 |  Trinidad & Tobago | Corpus Christi |
| 2031-06-12 |  Timor Leste | Corpus Christi |
| 2031-06-13 |  Isle of Man | Tourist Trophy, Senior Race Day |
| 2031-06-13 | Lichtenstein | Feiertagsbrücke |
| 2031-06-13 | British Virgin Islands | Sovereign’s Birthday |
| 2031-06-14 | United States of America | Flag Day |
| 2031-06-15 |  Azerbaijan | National Salvation Day |
| 2031-06-15 |  Brazil | Aniversário do estado |
| 2031-06-15 | Malaysia | Sultan of Kedah's Birthday |
| 2031-06-16 | Azerbaijan | National Salvation Day (substitute day) |
| 2031-06-16 |  Bermuda | National Heroes Day |
| 2031-06-16 |  Colombia | Corpus Christi |
| 2031-06-16 |  Gibraltar | Queen's Birthday |
| 2031-06-16 |  South Africa | Youth Day |
| 2031-06-17 | Western Sahara | Day of National Unity |
| 2031-06-17 | Iceland | Icelandic National Day |
| 2031-06-17 | United States of America | Bunker Hill Day |
| 2031-06-17 |  Papua New Guinea | King's Birthday |
| 2031-06-18 | Brazil | Dia do evangélico |
| 2031-06-18 | Seychelles | National Holiday |
| 2031-06-18 |  Cambodia | HM Queen Norodom Monineath Sihanouk the Queen-Mother's Birthday |
| 2031-06-18 | Iran | Demise of Prophet Muhammad and Imam Hassan (Mujtaba) |
| 2031-06-19 |  American Samoa | Juneteenth |
| 2031-06-19 |  Guam | Juneteenth |
| 2031-06-19 |  Puerto Rico | Juneteenth |
| 2031-06-19 | Trinidad & Tobago | Labour Day |
| 2031-06-19 | United States of America | Juneteenth |
| 2031-06-19 |  U.S. Virgin Islands | Juneteenth |
| 2031-06-20 |  Argentina | National Flag Day |
| 2031-06-20 |  Eritrea | Martyrs' Day |
| 2031-06-20 | United States of America | West Virginia Day |
| 2031-06-20 | Iran | Martyrdom of Imam Reza |
| 2031-06-21 | Ã…land Islands | Midsummer Day |
| 2031-06-21 | Bolivia | Andean Amazonian Chaqueño New Year |
| 2031-06-21 |  Canada | National Indigenous Peoples Day |
| 2031-06-21 | Chile | Indigenous People's Day |
| 2031-06-21 | Finland | Midsummer Day |
| 2031-06-21 | Greenland | National Day |
| 2031-06-21 | Sweden | Midsummer Day |
| 2031-06-21 | Togolese Republic | Day of the Martyrs |
| 2031-06-21 | Papua New Guinea | June Solstice |
| 2031-06-22 | Croatia | Anti-Fascist Struggle Day |
| 2031-06-23 | Switzerland | Jura Plebiscite |
| 2031-06-23 | Colombia | Sacred Heart |
| 2031-06-23 | Estonia | Victory Day |
| 2031-06-23 | Luxembourg | National Holiday |
| 2031-06-23 |  Latvia | Midsummer Eve |
| 2031-06-24 | Brazil | São João (AL) |
| 2031-06-24 | Brazil | Saint John's Day (PE) |
| 2031-06-24 | Canada | National Holiday (QC) |
| 2031-06-24 | China | Dragon Boat Festival |
| 2031-06-24 | Estonia | Midsummer Day |
| 2031-06-24 | Spain | San Juan |
| 2031-06-24 |  Hong Kong | Dragon Boat Festival |
| 2031-06-24 |  Lithuania | St. John's Day |
| 2031-06-24 | Latvia | Midsummer |
| 2031-06-24 |  Taiwan | Dragon Boat Festival |
| 2031-06-24 |  Venezuela | Battle of Carabobo |
| 2031-06-25 |  Mozambique | Independence Day |
| 2031-06-25 | Slovenia | Statehood Day |
| 2031-06-26 | Azerbaijan | Azerbaijan Armed Forces Day |
| 2031-06-26 | Madagascar | Independence Day |
| 2031-06-26 |  Somalia | Independence of British Somaliland |
| 2031-06-27 |  Djibouti | Independence Day |
| 2031-06-28 | Spain | DÃa de las Instituciones de Cantabria |
| 2031-06-28 | Ukraine | Constitution Day |
| 2031-06-28 | Iran | Martyrdom of Imam Hassan |
| 2031-06-29 | Brazil | São Pedro |
| 2031-06-29 | Switzerland | Saints Peter and Paul |
| 2031-06-29 | Chile | Saints Peter and Paul |
| 2031-06-29 | Malta | Saints Peter and Paul |
| 2031-06-29 |  Peru | Saints Peter and Paul |
| 2031-06-29 | Seychelles | Independence Day |
| 2031-06-29 |  Vatican City | Saints Peter and Paul |
| 2031-06-30 |  Democratic Republic of the Congo | Independence Day |
| 2031-06-30 | Central African Republic | General Prayer Day |
| 2031-06-30 | Colombia | Saints Peter and Paul |
| 2031-06-30 |  Egypt | 30 June Day |
| 2031-06-30 |  Guatemala | Army Day |
| 2031-06-30 | Ukraine | Constitution Day (substitute day) |
| 2031-06-30 | British Virgin Islands | Virgin Islands Day |
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