| Date | Country | Holiday name |
|---|---|---|
| 1999-04-01 |  Argentina | Maundy Thursday |
| 1999-04-01 |  Colombia | Maundy Thursday |
| 1999-04-01 |  Costa Rica | Maundy Thursday |
| 1999-04-01 |  Cyprus | Cyprus National Day |
| 1999-04-01 |  Denmark | Maundy Thursday |
| 1999-04-01 |  Ecuador | Maundy Thursday |
| 1999-04-01 |  Spain | Maundy Thursday |
| 1999-04-01 |  Faroe Islands | Maundy Thursday |
| 1999-04-01 |  Greenland | Maundy Thursday |
| 1999-04-01 |  Guatemala | Maundy Thursday |
| 1999-04-01 |  Honduras | Maundy Thursday |
| 1999-04-01 | Canary Islands | Maundy Thursday |
| 1999-04-01 |  Iran | Islamic Republic Day |
| 1999-04-01 |  Iceland | Maundy Thursday |
| 1999-04-01 |  Nicaragua | Maundy Thursday |
| 1999-04-01 |  Norway | Maundy Thursday |
| 1999-04-01 |  Peru | Maundy Thursday |
| 1999-04-01 |  Philippines | Maundy Thursday |
| 1999-04-01 |  Paraguay | Maundy Thursday |
| 1999-04-01 |  Svalbard & Jan Mayen | Maundy Thursday |
| 1999-04-01 |  San Marino | Inauguration Ceremony |
| 1999-04-01 |  El Salvador | Maundy Thursday |
| 1999-04-01 |  Uruguay | Maundy Thursday |
| 1999-04-01 |  Venezuela | Maundy Thursday |
| 1999-04-01 |  U.S. Virgin Islands | Maundy Thursday |
| 1999-04-01 |  Israel | Passover (Pesach) |
| 1999-04-01 |  Montenegro | Pesach |
| 1999-04-02 |  Andorra | Good Friday |
| 1999-04-02 |  Antigua & Barbuda | Good Friday |
| 1999-04-02 |  Anguilla | Good Friday |
| 1999-04-02 |  Angola | Good Friday |
| 1999-04-02 | Argentina | Day of the veterans and the fallen in Malvinas War |
| 1999-04-02 | Argentina | Good Friday |
| 1999-04-02 |  Australia | Good Friday |
| 1999-04-02 |  Aruba | Good Friday |
| 1999-04-02 |  Åland Islands | Good Friday |
| 1999-04-02 |  Barbados | Good Friday |
| 1999-04-02 |  Bermuda | Good Friday |
| 1999-04-02 |  Bolivia | Good Friday |
| 1999-04-02 |  Caribbean Netherlands | Good Friday |
| 1999-04-02 |  Brazil | Good Friday |
| 1999-04-02 |  Bahamas | Good Friday |
| 1999-04-02 |  Botswana | Good Friday |
| 1999-04-02 |  Belize | Good Friday |
| 1999-04-02 |  Canada | Good Friday |
| 1999-04-02 |  Switzerland | Good Friday |
| 1999-04-02 |  Cook Islands | Good Friday |
| 1999-04-02 |  Chile | Good Friday |
| 1999-04-02 |  Cameroon | Good Friday |
| 1999-04-02 | Colombia | Good Friday |
| 1999-04-02 | Costa Rica | Good Friday |
| 1999-04-02 |  Cuba | Good Friday |
| 1999-04-02 |  Cape Verde | Good Friday |
| 1999-04-02 |  Curaçao | Good Friday |
| 1999-04-02 |  Christmas Island | Good Friday |
| 1999-04-02 |  Czech Republic | Good Friday |
| 1999-04-02 |  Germany | Good Friday |
| 1999-04-02 | Denmark | Good Friday |
| 1999-04-02 |  Dominica | Good Friday |
| 1999-04-02 |  Dominican Republic | Good Friday |
| 1999-04-02 | Ecuador | Good Friday |
| 1999-04-02 |  Estonia | Good Friday |
| 1999-04-02 | Spain | Good Friday |
| 1999-04-02 |  Finland | Good Friday |
| 1999-04-02 |  Fiji | Good Friday |
| 1999-04-02 | Faroe Islands | Good Friday |
| 1999-04-02 |  United Kingdom | Good Friday |
| 1999-04-02 |  Grenada | Good Friday |
| 1999-04-02 |  Guernsey | Good Friday |
| 1999-04-02 |  Ghana | Good Friday |
| 1999-04-02 |  Gibraltar | Good Friday |
| 1999-04-02 | Greenland | Good Friday |
| 1999-04-02 |  The Gambia | Good Friday |
| 1999-04-02 |  Guadeloupe | Good Friday |
| 1999-04-02 |  Republic of Equatorial Guinea | Good Friday |
| 1999-04-02 | Guatemala | Good Friday |
| 1999-04-02 |  Guyana | Good Friday |
| 1999-04-02 |  Hong Kong | Good Friday |
| 1999-04-02 | Honduras | Good Friday |
| 1999-04-02 |  Haiti | Good Friday |
| 1999-04-02 | Canary Islands | Good Friday |
| 1999-04-02 |  Indonesia | Good Friday |
| 1999-04-02 |  Isle of Man | Good Friday |
| 1999-04-02 | Iran | Sizdah Bedar |
| 1999-04-02 | Iceland | Good Friday |
| 1999-04-02 |  Jersey | Good Friday |
| 1999-04-02 |  Jamaica | Good Friday |
| 1999-04-02 |  Kenya | Good Friday |
| 1999-04-02 |  St. Kitts & Nevis | Good Friday |
| 1999-04-02 |  Cayman Islands | Good Friday |
| 1999-04-02 |  St. Lucia | Good Friday |
| 1999-04-02 |  Lichtenstein | Good Friday |
| 1999-04-02 |  Lesotho | Good Friday |
| 1999-04-02 |  Latvia | Good Friday |
| 1999-04-02 | Montenegro | Good Friday |
| 1999-04-02 |  Martinique | Good Friday |
| 1999-04-02 |  Montserrat | Good Friday |
| 1999-04-02 |  Malta | Good Friday |
| 1999-04-02 |  Malawi | Good Friday |
| 1999-04-02 |  Malaysia | Good Friday |
| 1999-04-02 |  Namibia | Good Friday |
| 1999-04-02 |  Nigeria | Good Friday |
| 1999-04-02 | Nicaragua | Good Friday |
| 1999-04-02 | Norway | Good Friday |
| 1999-04-02 |  New Zealand | Good Friday |
| 1999-04-02 |  Panama | Good Friday |
| 1999-04-02 | Peru | Good Friday |
| 1999-04-02 | Philippines | Good Friday |
| 1999-04-02 |  Portugal | Good Friday |
| 1999-04-02 | Paraguay | Good Friday |
| 1999-04-02 |  Rwanda | Good Friday |
| 1999-04-02 |  Seychelles | Good Friday |
| 1999-04-02 |  Sweden | Good Friday |
| 1999-04-02 |  Singapore | Good Friday |
| 1999-04-02 |  St. Helena | Good Friday |
| 1999-04-02 | Svalbard & Jan Mayen | Good Friday |
| 1999-04-02 |  Slovakia | Good Friday |
| 1999-04-02 |  Sierra Leone | Good Friday |
| 1999-04-02 |  Suriname | Good Friday |
| 1999-04-02 | El Salvador | Good Friday |
| 1999-04-02 |  Sint Maarten | Good Friday |
| 1999-04-02 |  Swaziland | Good Friday |
| 1999-04-02 |  Turks & Caicos Islands | Good Friday |
| 1999-04-02 |  Tonga | Good Friday |
| 1999-04-02 |  Trinidad & Tobago | Good Friday |
| 1999-04-02 |  Tanzania | Good Friday |
| 1999-04-02 |  Uganda | Good Friday |
| 1999-04-02 | Uruguay | Good Friday |
| 1999-04-02 |  St. Vincent & Grenadines | Good Friday |
| 1999-04-02 | Venezuela | Good Friday |
| 1999-04-02 |  British Virgin Islands | Good Friday |
| 1999-04-02 | U.S. Virgin Islands | Good Friday |
| 1999-04-02 |  Vanuatu | Good Friday |
| 1999-04-02 |  South Africa | Good Friday |
| 1999-04-02 |  Zambia | Good Friday |
| 1999-04-02 |  Zimbabwe | Good Friday |
| 1999-04-02 |  Papua New Guinea | Good Friday |
| 1999-04-02 |  United States of America | Good Friday (KY) |
| 1999-04-03 | Australia | Easter Saturday |
| 1999-04-03 | Botswana | Easter Saturday |
| 1999-04-03 | Belize | Easter Saturday |
| 1999-04-03 | Fiji | Easter Saturday |
| 1999-04-03 |  Guinea | National Holiday |
| 1999-04-03 | Guatemala | Easter Saturday |
| 1999-04-03 | Hong Kong | Easter Saturday |
| 1999-04-03 | Seychelles | Easter Saturday |
| 1999-04-03 | El Salvador | Easter Saturday |
| 1999-04-03 | Papua New Guinea | Holy Saturday |
| 1999-04-04 | Andorra | Easter Sunday |
| 1999-04-04 |  Albania | Catholic Easter |
| 1999-04-04 | Angola | Peace Day |
| 1999-04-04 |  Austria | Easter Sunday |
| 1999-04-04 | Australia | Easter Sunday |
| 1999-04-04 |  Bosnia and Herzegovina | Easter Sunday |
| 1999-04-04 |  Burkina Faso | Easter Sunday |
| 1999-04-04 | Canada | Easter Sunday |
| 1999-04-04 | Switzerland | Easter Sunday |
| 1999-04-04 | Chile | Easter Sunday |
| 1999-04-04 | Colombia | Easter Sunday |
| 1999-04-04 | Denmark | Easter Sunday |
| 1999-04-04 | Estonia | Easter Sunday |
| 1999-04-04 | Finland | Easter Sunday |
| 1999-04-04 | Faroe Islands | Easter Sunday |
| 1999-04-04 | Greenland | Easter Sunday |
| 1999-04-04 | Hong Kong | Easter Sunday |
| 1999-04-04 |  Croatia | Easter Sunday |
| 1999-04-04 | Haiti | Easter Sunday |
| 1999-04-04 |  Hungary | Easter Sunday |
| 1999-04-04 |  Ireland | Easter Sunday |
| 1999-04-04 | Iceland | Easter Sunday |
| 1999-04-04 |  Italia | Easter Sunday |
| 1999-04-04 | Kenya | Easter Sunday |
| 1999-04-04 |  Lithuania | Easter Sunday |
| 1999-04-04 | Latvia | Easter Sunday |
| 1999-04-04 | Montenegro | Easter Sunday |
| 1999-04-04 |  Madagascar | Easter Sunday |
| 1999-04-04 |  Netherlands | Easter Sunday |
| 1999-04-04 | Norway | Easter Sunday |
| 1999-04-04 | Peru | Easter Sunday |
| 1999-04-04 | Philippines | Easter Sunday |
| 1999-04-04 |  Poland | Easter Sunday |
| 1999-04-04 | Portugal | Easter Sunday |
| 1999-04-04 | Seychelles | Easter Sunday |
| 1999-04-04 |  Slovenia | Easter Sunday |
| 1999-04-04 | Svalbard & Jan Mayen | Easter Sunday |
| 1999-04-04 | San Marino | Easter Sunday |
| 1999-04-04 |  Senegal | National Holiday |
| 1999-04-04 | Sint Maarten | Easter Sunday |
| 1999-04-04 | Trinidad & Tobago | Easter Sunday |
| 1999-04-04 |  Taiwan | Children's Day |
| 1999-04-04 | Uganda | Easter Sunday |
| 1999-04-04 | Venezuela | Easter Sunday |
| 1999-04-04 |  Kosovo | Easter Sunday |
| 1999-04-04 | Papua New Guinea | Easter Sunday |
| 1999-04-04 | Iran | Eid al-Ghadeer |
| 1999-04-05 | Andorra | Easter Monday |
| 1999-04-05 | Antigua & Barbuda | Easter Monday |
| 1999-04-05 | Anguilla | Easter Monday |
| 1999-04-05 | Albania | Catholic Easter |
| 1999-04-05 | Austria | Easter Monday |
| 1999-04-05 | Australia | Easter Monday |
| 1999-04-05 | Aruba | Easter Monday |
| 1999-04-05 | Åland Islands | Easter Monday |
| 1999-04-05 | Bosnia and Herzegovina | Easter Monday |
| 1999-04-05 | Barbados | Easter Monday |
| 1999-04-05 |  Belgium | Easter Monday |
| 1999-04-05 | Burkina Faso | Easter Monday |
| 1999-04-05 |  Benin | Easter Monday |
| 1999-04-05 |  St. Barths | Easter Monday |
| 1999-04-05 | Caribbean Netherlands | Easter Monday |
| 1999-04-05 | Bahamas | Easter Monday |
| 1999-04-05 | Botswana | Easter Monday |
| 1999-04-05 | Belize | Easter Monday |
| 1999-04-05 | Canada | Easter Monday |
| 1999-04-05 |  Cocos (Keeling) Islands | Easter Monday |
| 1999-04-05 |  Central African Republic | Easter Monday |
| 1999-04-05 |  Republic of the Congo | Easter Monday |
| 1999-04-05 | Switzerland | Easter Monday |
| 1999-04-05 |  Republic of Côte d'Ivoire | Easter Monday |
| 1999-04-05 | Cook Islands | Easter Monday |
| 1999-04-05 |  China | Qingming Festival |
| 1999-04-05 | Curaçao | Easter Monday |
| 1999-04-05 | Czech Republic | Easter Monday |
| 1999-04-05 | Germany | Easter Monday |
| 1999-04-05 | Denmark | Easter Monday |
| 1999-04-05 | Dominica | Easter Monday |
| 1999-04-05 | Spain | Easter Monday |
| 1999-04-05 | Finland | Easter Monday |
| 1999-04-05 | Fiji | Easter Monday |
| 1999-04-05 | Faroe Islands | Easter Monday |
| 1999-04-05 |  France | Easter Monday |
| 1999-04-05 |  Gabon | Easter Monday |
| 1999-04-05 | United Kingdom | Easter Monday |
| 1999-04-05 | Grenada | Easter Monday |
| 1999-04-05 |  French Guiana | Easter Monday |
| 1999-04-05 | Guernsey | Easter Monday |
| 1999-04-05 | Ghana | Easter Monday |
| 1999-04-05 | Gibraltar | Easter Monday |
| 1999-04-05 | Greenland | Easter Monday |
| 1999-04-05 | The Gambia | Easter Monday |
| 1999-04-05 | Guinea | Easter Monday |
| 1999-04-05 | Guadeloupe | Easter Monday |
| 1999-04-05 | Guyana | Easter Monday |
| 1999-04-05 | Hong Kong | Easter Monday |
| 1999-04-05 | Hong Kong | Qingming Festival |
| 1999-04-05 | Croatia | Easter Monday |
| 1999-04-05 | Hungary | Easter Monday |
| 1999-04-05 | Ireland | Easter Monday |
| 1999-04-05 | Isle of Man | Easter Monday |
| 1999-04-05 | Iceland | Easter Monday |
| 1999-04-05 | Italia | Easter Monday |
| 1999-04-05 | Jersey | Easter Monday |
| 1999-04-05 | Jamaica | Easter Monday |
| 1999-04-05 | Kenya | Easter Monday |
| 1999-04-05 | St. Kitts & Nevis | Easter Monday |
| 1999-04-05 | Cayman Islands | Easter Monday |
| 1999-04-05 | St. Lucia | Easter Monday |
| 1999-04-05 | Lichtenstein | Easter Monday |
| 1999-04-05 | Lesotho | Easter Monday |
| 1999-04-05 | Lithuania | Easter Monday |
| 1999-04-05 |  Luxembourg | Easter Monday |
| 1999-04-05 | Latvia | Easter Monday |
| 1999-04-05 |  Monaco | Easter Monday |
| 1999-04-05 | Montenegro | Easter Sunday |
| 1999-04-05 |  St. Martin | Easter Monday |
| 1999-04-05 | Madagascar | Easter Monday |
| 1999-04-05 |  Republic of Mali | Easter Monday |
| 1999-04-05 | Martinique | Easter Monday |
| 1999-04-05 | Montserrat | Easter Monday |
| 1999-04-05 | Malawi | Easter Monday |
| 1999-04-05 | Namibia | Easter Monday |
| 1999-04-05 |  New Caledonia | Easter Monday |
| 1999-04-05 |  Republic of the Niger | Easter Monday |
| 1999-04-05 | Nigeria | Easter Monday |
| 1999-04-05 | Netherlands | Easter Monday |
| 1999-04-05 | Norway | Easter Monday |
| 1999-04-05 | New Zealand | Easter Monday |
| 1999-04-05 | Poland | Easter Monday |
| 1999-04-05 |  St. Pierre & Miquelon | Easter Monday |
| 1999-04-05 |  Réunion | Easter Monday |
| 1999-04-05 | Rwanda | Easter Monday |
| 1999-04-05 | Seychelles | Easter Monday |
| 1999-04-05 | Sweden | Easter Monday |
| 1999-04-05 | St. Helena | Easter Monday |
| 1999-04-05 | Slovenia | Easter Monday |
| 1999-04-05 | Svalbard & Jan Mayen | Easter Monday |
| 1999-04-05 | Slovakia | Easter Monday |
| 1999-04-05 | Sierra Leone | Easter Monday |
| 1999-04-05 | San Marino | Easter Monday |
| 1999-04-05 | Senegal | Easter Monday |
| 1999-04-05 | Suriname | Easter Monday |
| 1999-04-05 | Sint Maarten | Easter Monday |
| 1999-04-05 | Swaziland | Easter Monday |
| 1999-04-05 | Turks & Caicos Islands | Easter Monday |
| 1999-04-05 |  Chad | Easter Monday |
| 1999-04-05 |  Togolese Republic | Easter Monday |
| 1999-04-05 | Tonga | Easter Monday |
| 1999-04-05 | Taiwan | Children's Day (substitute day) |
| 1999-04-05 | Taiwan | Tomb Sweeping Day |
| 1999-04-05 | Tanzania | Easter Monday |
| 1999-04-05 | Uganda | Easter Monday |
| 1999-04-05 |  Vatican City | Easter Monday |
| 1999-04-05 | St. Vincent & Grenadines | Easter Monday |
| 1999-04-05 | British Virgin Islands | Easter Monday |
| 1999-04-05 | U.S. Virgin Islands | Easter Monday |
| 1999-04-05 | Vanuatu | Easter Monday |
| 1999-04-05 |  Mayotte | Easter Monday |
| 1999-04-05 | South Africa | Family Day |
| 1999-04-05 | Zambia | Easter Monday |
| 1999-04-05 | Zimbabwe | Easter Monday |
| 1999-04-05 | Papua New Guinea | Easter Monday |
| 1999-04-06 |  Burundi | Ntaryamira Day |
| 1999-04-06 | Cocos (Keeling) Islands | Self Determination Day |
| 1999-04-06 | New Zealand | Provincial anniversary day |
| 1999-04-06 |  Thailand | Chakri Memorial Day |
| 1999-04-07 |  Mozambique | Women’s Day |
| 1999-04-07 | Rwanda | Genocide Memorial Day |
| 1999-04-07 | Tanzania | Karume Day |
| 1999-04-07 | Israel | Mimouna, Seventh day of Passover |
| 1999-04-08 | Switzerland | Näfelser Fahrt |
| 1999-04-09 |  Bulgaria | Good Friday |
| 1999-04-09 | Cyprus | Good Friday |
| 1999-04-09 |  Eritrea | Orthodox Good Friday |
| 1999-04-09 |  Ethiopia | Good Friday |
| 1999-04-09 |  Georgia | National Unity Day |
| 1999-04-09 | Georgia | Good Friday |
| 1999-04-09 |  Greece | Good Friday |
| 1999-04-09 |  Liberia | Fast and Prayer Day |
| 1999-04-09 | Montenegro | Good Friday |
| 1999-04-09 | Philippines | Day of Valor |
| 1999-04-09 |  Romania | Good Friday |
| 1999-04-09 |  Serbia | Orthodox Good Friday |
| 1999-04-09 |  Tunisia | عيد الشهداء |
| 1999-04-09 | Kosovo | Constitution Day |
| 1999-04-10 | Georgia | Easter Saturday |
| 1999-04-11 | Albania | Orthodox Easter |
| 1999-04-11 | Bosnia and Herzegovina | Orthodox Easter |
| 1999-04-11 | Bulgaria | Easter Sunday |
| 1999-04-11 | Costa Rica | Gesta Heroica de Juan Santamaría |
| 1999-04-11 | Cyprus | Easter Sunday |
| 1999-04-11 | Eritrea | Orthodox Easter |
| 1999-04-11 | Ethiopia | Easter Sunday |
| 1999-04-11 | Georgia | Easter Sunday |
| 1999-04-11 | Greece | Easter Sunday |
| 1999-04-11 |  Moldova | Easter Sunday |
| 1999-04-11 | Montenegro | Easter Sunday |
| 1999-04-11 |  Macedonia | Orthodox Easter |
| 1999-04-11 | Romania | Easter Sunday |
| 1999-04-11 | Serbia | Orthodox Easter |
| 1999-04-11 |  Sudan | Coptic Easter |
| 1999-04-11 |  Ukraine | Orthodox Easter |
| 1999-04-11 | Kosovo | Orthodox Easter |
| 1999-04-12 | Albania | Orthodox Easter |
| 1999-04-12 | Bulgaria | Easter Monday |
| 1999-04-12 | Cyprus | Easter Monday |
| 1999-04-12 |  Egypt | Sham El Nessim |
| 1999-04-12 | Georgia | Easter Monday |
| 1999-04-12 | Greece | Easter Monday |
| 1999-04-12 | Moldova | Easter Monday |
| 1999-04-12 | Macedonia | Orthodox Easter Monday |
| 1999-04-12 | Romania | Easter Monday |
| 1999-04-12 | Serbia | Orthodox Easter Monday |
| 1999-04-12 | Ukraine | Orthodox Easter |
| 1999-04-13 | Thailand | Songkran Festival |
| 1999-04-13 |  Cambodia | Khmer New Year's Day |
| 1999-04-14 |  People's Republic of Bangladesh | Bengali New Year's Day |
| 1999-04-14 | Honduras | Día de las Américas |
| 1999-04-14 | Thailand | Songkran Festival |
| 1999-04-14 | Cambodia | Khmer New Year's Day |
| 1999-04-14 |  Laos | Lao New Year's Day |
| 1999-04-15 | Bolivia | Tarija Day |
| 1999-04-15 | Malaysia | Declaration of Malacca City as Historical City |
| 1999-04-15 | Thailand | Songkran Festival |
| 1999-04-15 | Cambodia | Khmer New Year's Day |
| 1999-04-15 | Laos | Lao New Year's Day |
| 1999-04-16 |  Puerto Rico | Birthday of José de Diego |
| 1999-04-16 | United States of America | Emancipation Day |
| 1999-04-16 | Laos | Lao New Year's Day |
| 1999-04-17 |  American Samoa | American Samoa Flag Day |
| 1999-04-17 | Gabon | Women's Day |
| 1999-04-17 |  Jordan | Islamic New Year (estimated) |
| 1999-04-17 |  Kuwait | Islamic New Year (estimated) |
| 1999-04-17 |  United Arab Emirates | Islamic New Year |
| 1999-04-17 | Bosnia and Herzegovina | Islamic New Year |
| 1999-04-17 |  Bahrain | Islamic New Year |
| 1999-04-17 |  Brunei | Islamic New Year |
| 1999-04-17 | Cocos (Keeling) Islands | Islamic New Year |
| 1999-04-17 |  Djibouti | Islamic New Year |
| 1999-04-17 |  Algeria | Islamic New Year |
| 1999-04-17 | Egypt | Islamic New Year |
| 1999-04-17 |  Western Sahara | Islamic New Year |
| 1999-04-17 | Indonesia | Islamic New Year |
| 1999-04-17 |  Comoros | Islamic New Year |
| 1999-04-17 |  Libya | Islamic New Year |
| 1999-04-17 |  Kingdom of Morocco | Islamic New Year |
| 1999-04-17 |  Mauritania | Islamic New Year |
| 1999-04-17 | Malaysia | Islamic New Year |
| 1999-04-17 | Republic of the Niger | Islamic New Year |
| 1999-04-17 | Nigeria | Islamic New Year |
| 1999-04-17 | Sudan | Islamic New Year |
| 1999-04-17 |  Somalia | Islamic New Year |
| 1999-04-17 | Tunisia | Islamic New Year |
| 1999-04-18 | Zimbabwe | Independence Day |
| 1999-04-19 | Moldova | Memorial Day |
| 1999-04-19 | St. Helena | Queen's Birthday |
| 1999-04-19 | Swaziland | Birthday of King Mswati III |
| 1999-04-19 | United States of America | Patriots' Day |
| 1999-04-19 | Venezuela | Declaration of Independence |
| 1999-04-20 |  Belarus | Commemoration Day |
| 1999-04-21 | Brazil | Tiradentes' Day |
| 1999-04-21 | Brazil | Fundação de Brasília (DF) |
| 1999-04-21 | Brazil | Data magna do estado (MG) |
| 1999-04-21 | Israel | Independence Day (Yom HaAtzmaut) |
| 1999-04-22 | Iceland | First Day of Summer |
| 1999-04-23 | Spain | Día de Aragón (AR) |
| 1999-04-23 | Spain | Fiesta de Castilla y León (CL) |
| 1999-04-23 |  Turkey | National Sovereignty and Children's Day |
| 1999-04-24 |  Armenia | Mother's Day |
| 1999-04-24 | Faroe Islands | Flag Day |
| 1999-04-24 | Republic of the Niger | Concord Day |
| 1999-04-25 | Australia | Anzac Day |
| 1999-04-25 | Cocos (Keeling) Islands | Anzac Day |
| 1999-04-25 | Cook Islands | Anzac Day |
| 1999-04-25 | Christmas Island | Anzac Day |
| 1999-04-25 | Egypt | Sinai Liberation Day |
| 1999-04-25 | Italia | Liberation Day |
| 1999-04-25 | New Zealand | ANZAC Day |
| 1999-04-25 | Portugal | Liberty Day |
| 1999-04-25 | Swaziland | National Flag Day |
| 1999-04-25 | Tonga | ANZAC Day |
| 1999-04-25 |  Vietnam | Hung Kings Commemorations |
| 1999-04-25 | Iran | Tasoua |
| 1999-04-26 | Australia | Anzac Day |
| 1999-04-26 | Australia | Anzac Day (substitute day) (WA) |
| 1999-04-26 | Malaysia | Sultan of Terengganu's Birthday |
| 1999-04-26 | New Zealand | ANZAC Day (substitute day) |
| 1999-04-26 | Swaziland | National Flag Day (substitute day) |
| 1999-04-26 | Tanzania | Union Day |
| 1999-04-26 | United States of America | Confederate Memorial Day |
| 1999-04-26 | People's Republic of Bangladesh | Day of Ashura |
| 1999-04-26 | Bahrain | Day of Ashura |
| 1999-04-26 | Algeria | Day of Ashura |
| 1999-04-26 | The Gambia | Day of Ashura |
| 1999-04-26 | Iran | Ashoura |
| 1999-04-26 | Senegal | Day of Ashura |
| 1999-04-27 | Aruba | Kings Day |
| 1999-04-27 | Caribbean Netherlands | Kings Day |
| 1999-04-27 | Curaçao | Kings Day |
| 1999-04-27 | France | Abolition of Slavery |
| 1999-04-27 | Slovenia | Day of Uprising Against Occupation |
| 1999-04-27 | Sierra Leone | Independence Day |
| 1999-04-27 | Sint Maarten | King's Day |
| 1999-04-27 | Togolese Republic | Independence Day |
| 1999-04-27 | Mayotte | Abolition of Slavery |
| 1999-04-27 | South Africa | Freedom Day |
| 1999-04-28 | Barbados | National Heroes Day |
| 1999-04-28 | Gibraltar | Workers Memorial Day |
| 1999-04-29 |  Japan | Greenery Day |
| 1999-04-29 | Cambodia | Visaka Bochea Day |
| 1999-04-30 | Caribbean Netherlands | Rincon Day |
| 1999-04-30 | Denmark | Prayer Day |
| 1999-04-30 | Faroe Islands | Great Prayer Day |
| 1999-04-30 | Greenland | Prayer Day |
| 1999-04-30 | Netherlands | Queen's Day |
| 1999-04-30 |  São Tomé & Príncipe | Labour Day (substitute day) |
| 1999-04-30 | Sint Maarten | Carnival |
| 1999-04-30 | United States of America | Arbor Day |
| 1999-04-30 | Vietnam | Day of liberating the South for national reunification |
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