Summary of DST in 2012 Worldwide
North America
| Country | Start of DST | End of DST |
| Bermuda | 2012-3-11 | 2012-11-4 |
| Canada | 2012-3-11 | 2012-11-4 |
| Cuba | 2012-4-1 | 2012-11-4 |
| Greenland | 2012-3-24 | 2012-10-27 |
| Haiti | 2012-3-11 | 2012-11-4 |
| Mexico | 2012-4-1 | 2012-10-28 |
| Saint Pierre and Miquelon | 2012-3-11 | 2012-11-4 |
| The Bahamas | 2012-3-11 | 2012-11-4 |
| Turks and Caicos Islands | 2012-3-11 | 2012-11-4 |
| United States | 2012-3-11 | 2012-11-4 |
Oceania
| Country | Start of DST | End of DST |
| Australia | 2012-10-7 | 2012-4-1 |
| Fiji | 2012-10-21 | 2012-1-22 |
| New Zealand | 2012-9-30 | 2012-4-1 |
| Samoa | 2012-9-30 | 2012-4-1 |
South America
| Country | Start of DST | End of DST |
| Brazil | 2012-10-21 | 2012-2-25 |
| Chile | 2012-9-2 | 2012-4-28 |
| Paraguay | 2012-10-7 | 2012-4-7 |
| Uruguay | 2012-10-7 | 2012-3-11 |
Africa
| Country | Start of DST | End of DST |
| Burkina Faso | 2012-10-21 | 2012-2-25 |
| Morocco | 2012-4-29 | 2012-7-20 |
| Namibia | 2012-9-2 | 2012-4-1 |
Asia
| Country | Start of DST | End of DST |
| Azerbaijan | 2012-3-25 | 2012-10-28 |
| Cyprus | 2012-3-25 | 2012-10-28 |
| Iran | 2012-3-21 | 2012-9-20 |
| Israel | 2012-3-30 | 2012-9-23 |
| Jordan | 2012-3-30 | - |
| Lebanon | 2012-3-25 | 2012-10-27 |
| Nagorno-Karabakh | 2012-3-25 | 2012-10-28 |
| Northern Cyprus | 2012-3-25 | 2012-10-28 |
| Philippines | 2012-3-25 | 2012-10-28 |
| State of Palestine | 2012-3-30 | 2012-9-21 |
| Syria | 2012-3-30 | 2012-10-25 |
| Turkey | 2012-3-25 | 2012-10-28 |
Europe
| Country | Start of DST | End of DST |
| Albania | 2012-3-25 | 2012-10-28 |
| Andorra | 2012-3-25 | 2012-10-28 |
| Austria | 2012-3-25 | 2012-10-28 |
| Belgium | 2012-3-25 | 2012-10-28 |
| Bosnia and Herzegovina | 2012-3-25 | 2012-10-28 |
| Bulgaria | 2012-3-25 | 2012-10-28 |
| Croatia | 2012-3-25 | 2012-10-28 |
| Czech Republic | 2012-3-25 | 2012-10-28 |
| Denmark | 2012-3-25 | 2012-10-28 |
| Estonia | 2012-3-25 | 2012-10-28 |
| Faroe Islands | 2012-3-25 | 2012-10-28 |
| Finland | 2012-3-25 | 2012-10-28 |
| France | 2012-3-25 | 2012-10-28 |
| Germany | 2012-3-25 | 2012-10-28 |
| Gibraltar | 2012-3-25 | 2012-10-28 |
| Greece | 2012-3-25 | 2012-10-28 |
| Guernsey | 2012-3-25 | 2012-10-28 |
| Hungary | 2012-3-25 | 2012-10-28 |
| Isle of Man | 2012-3-25 | 2012-10-28 |
| Italy | 2012-3-25 | 2012-10-28 |
| Jersey | 2012-3-25 | 2012-10-28 |
| Kosovo | 2012-3-25 | 2012-10-28 |
| Latvia | 2012-3-25 | 2012-10-28 |
| Liechtenstein | 2012-3-25 | 2012-10-28 |
| Lithuania | 2012-3-25 | 2012-10-28 |
| Luxembourg | 2012-3-25 | 2012-10-28 |
| Malta | 2012-3-25 | 2012-10-28 |
| Moldova | 2012-3-25 | 2012-10-28 |
| Monaco | 2012-4-29 | 2012-7-20 |
| Montenegro | 2012-3-25 | 2012-10-28 |
| Netherlands | 2012-3-25 | 2012-10-28 |
| Norway | 2012-3-25 | 2012-10-28 |
| Poland | 2012-3-25 | 2012-10-28 |
| Portugal | 2012-3-25 | 2012-10-28 |
| Republic of Ireland | 2012-3-25 | 2012-10-28 |
| Republic of Macedonia | 2012-3-25 | 2012-10-28 |
| Romania | 2012-3-25 | 2012-10-28 |
| Russia | 2012-3-25 | 2012-10-28 |
| San Marino | 2012-3-25 | 2012-10-28 |
| Serbia | 2012-3-25 | 2012-10-28 |
| Slovakia | 2012-3-25 | 2012-10-28 |
| Slovenia | 2012-3-25 | 2012-10-28 |
| Spain | 2012-3-25 | 2012-10-28 |
| Svalbard | 2012-3-25 | 2012-10-28 |
| Sweden | 2012-3-25 | 2012-10-28 |
| Switzerland | 2012-3-25 | 2012-10-28 |
| Transnistria | 2012-3-25 | 2012-10-28 |
| Ukraine | 2012-3-25 | 2012-10-28 |
| United Kingdom | 2012-3-25 | 2012-10-28 |