Summary of DST in 2004 Worldwide
North America
| Country | Start of DST | End of DST |
| Bermuda | 2004-4-4 | 2004-10-31 |
| Canada | 2004-4-4 | 2004-10-31 |
| Cuba | 2004-3-28 | - |
| Greenland | 2004-3-27 | 2004-10-30 |
| Mexico | 2004-4-4 | 2004-10-31 |
| Saint Pierre and Miquelon | 2004-4-4 | 2004-10-31 |
| The Bahamas | 2004-4-4 | 2004-10-31 |
| Turks and Caicos Islands | 2004-4-4 | 2004-10-31 |
| United States | 2004-4-4 | 2004-10-31 |
Oceania
| Country | Start of DST | End of DST |
| Australia | 2004-10-31 | 2004-3-28 |
| New Zealand | 2004-10-3 | 2004-3-21 |
South America
| Country | Start of DST | End of DST |
| Brazil | 2004-11-2 | 2004-2-14 |
| Chile | 2004-10-10 | 2004-3-13 |
| Falkland Islands | 2004-9-5 | 2004-4-18 |
| Paraguay | 2004-10-17 | 2004-4-3 |
| Uruguay | 2004-9-19 | - |
Africa
| Country | Start of DST | End of DST |
| Burkina Faso | 2004-11-2 | 2004-2-14 |
| Egypt | 2004-4-30 | 2004-9-30 |
| Namibia | 2004-9-5 | 2004-4-4 |
Asia
| Country | Start of DST | End of DST |
| Armenia | 2004-3-28 | 2004-10-31 |
| Azerbaijan | 2004-3-28 | 2004-10-31 |
| Cyprus | 2004-3-28 | 2004-10-31 |
| Georgia | 2004-3-28 | 2004-10-31 |
| Iran | 2004-3-21 | 2004-9-20 |
| Iraq | 2004-4-1 | 2004-10-1 |
| Israel | 2004-4-7 | 2004-9-22 |
| Jordan | 2004-3-26 | 2004-10-15 |
| Kazakhstan | 2004-3-28 | 2004-10-31 |
| Kyrgyzstan | 2004-3-28 | 2004-10-31 |
| Lebanon | 2004-3-28 | 2004-10-30 |
| Mongolia | 2004-3-27 | 2004-9-25 |
| Nagorno-Karabakh | 2004-3-28 | 2004-10-31 |
| Northern Cyprus | 2004-3-28 | 2004-10-31 |
| Philippines | 2004-3-28 | 2004-10-31 |
| State of Palestine | 2004-4-16 | 2004-10-1 |
| Syria | 2004-4-1 | 2004-9-30 |
| Turkey | 2004-3-28 | 2004-10-31 |
Europe
| Country | Start of DST | End of DST |
| Albania | 2004-3-28 | 2004-10-31 |
| Andorra | 2004-3-28 | 2004-10-31 |
| Austria | 2004-3-28 | 2004-10-31 |
| Belarus | 2004-3-28 | 2004-10-31 |
| Belgium | 2004-3-28 | 2004-10-31 |
| Bosnia and Herzegovina | 2004-3-28 | 2004-10-31 |
| Bulgaria | 2004-3-28 | 2004-10-31 |
| Croatia | 2004-3-28 | 2004-10-31 |
| Czech Republic | 2004-3-28 | 2004-10-31 |
| Denmark | 2004-3-28 | 2004-10-31 |
| Estonia | 2004-3-28 | 2004-10-31 |
| Faroe Islands | 2004-3-28 | 2004-10-31 |
| Finland | 2004-3-28 | 2004-10-31 |
| France | 2004-3-28 | 2004-10-31 |
| Germany | 2004-3-28 | 2004-10-31 |
| Gibraltar | 2004-3-28 | 2004-10-31 |
| Greece | 2004-3-28 | 2004-10-31 |
| Guernsey | 2004-3-28 | 2004-10-31 |
| Hungary | 2004-3-28 | 2004-10-31 |
| Isle of Man | 2004-3-28 | 2004-10-31 |
| Italy | 2004-3-28 | 2004-10-31 |
| Jersey | 2004-3-28 | 2004-10-31 |
| Kosovo | 2004-3-28 | 2004-10-31 |
| Latvia | 2004-3-28 | 2004-10-31 |
| Liechtenstein | 2004-3-28 | 2004-10-31 |
| Lithuania | 2004-3-28 | 2004-10-31 |
| Luxembourg | 2004-3-28 | 2004-10-31 |
| Malta | 2004-3-28 | 2004-10-31 |
| Moldova | 2004-3-28 | 2004-10-31 |
| Montenegro | 2004-3-28 | 2004-10-31 |
| Netherlands | 2004-3-28 | 2004-10-31 |
| Norway | 2004-3-28 | 2004-10-31 |
| Poland | 2004-3-28 | 2004-10-31 |
| Portugal | 2004-3-28 | 2004-10-31 |
| Republic of Ireland | 2004-3-28 | 2004-10-31 |
| Republic of Macedonia | 2004-3-28 | 2004-10-31 |
| Romania | 2004-3-28 | 2004-10-31 |
| Russia | 2004-3-28 | 2004-10-31 |
| San Marino | 2004-3-28 | 2004-10-31 |
| Serbia | 2004-3-28 | 2004-10-31 |
| Slovakia | 2004-3-28 | 2004-10-31 |
| Slovenia | 2004-3-28 | 2004-10-31 |
| Spain | 2004-3-28 | 2004-10-31 |
| Svalbard | 2004-3-28 | 2004-10-31 |
| Sweden | 2004-3-28 | 2004-10-31 |
| Switzerland | 2004-3-28 | 2004-10-31 |
| Transnistria | 2004-3-28 | 2004-10-31 |
| Ukraine | 2004-3-28 | 2004-10-31 |
| United Kingdom | 2004-3-28 | 2004-10-31 |