GMT = Greenwich Mean Time
DST = Daylight Saving Time
* To know : for some countries (as United States) whose too many cities had time zone change in their past and/or also used or not DST, hour calcul can be false in this periods for this cities.
** United States of America : For cities that observe daylight saving time before 1967, you have to know if the city observe daylight saving time the year you are looking for. You have to know also that these cities that observe daylight time did not use all same dates for begins and ends DST periods, so calcul can be true for one city and one time and false for other city at same time. If you want to know for sure for a city and a time before 1967, contact the webmaster.
ASIA
Afghanistan
China
AFRICA
Algeria
Angola
Benin
Burkina Faso
Burundi
Cameroon
Cape Verde
Central African Republic
Chad
Congo
Ivory Coast
Egypt
Gabon
Gambia
Ghana
Guinea
Guinea-Bissau
Kenya
Lesotho
Liberia
Libya
Madagascar
Madere
Malawi
Mali
Mauritania
Mauritius
Morocco
Mozambique
Niger
EUROPA
Austria
Belgium
Bulgaria
Denmark
France
Germany
Great Britain (UK)
Spain
Switzerland
NORTH AMERICA
United States of America (Some states ready, still working on)
*States out of calculation : Alaska, Guam
States ready for calculation (stay alert !) :
Alabama
* From 24-04-1966 to 30-10-1966, 56 cities used DST (Daylight Saving Time), others not.
Arizona unified (since 1967)
* No more DST after 29-10-1967
Est Arizona (before 1967)
* GMT-7h
West Arizona (before 1967)
* with GMT-8h from 01-01-1900 to 07-03-1945, GMT-7h after.
Arkansas
California
Colorado
Connecticut
North Carolina unified
* after 1946 all state in GMT- 5h
North Carolina Est zone
* Est zone before 1947 GMT-5h
North Carolina West zone
* West zone before 1947 GMT-6h
South Carolina
North Dakota (cities GMT-7 h)
North Dakota (cities GMT-6 h)
South Dakota (West zone GMT-7h)
South Dakota (Est zone GMT-6h)
District of Colombia
Florida (West zone GMT-6h)
Florida (Est zone GMT-5)
* Florida Est zone GMT-6h before 01-01-1919, GMT-5 after)
Georgia(Est zone and unified)
* GMT-5h for this zone before 1941, all state after. Georgia(West zone before 1941)
* GMT-6h for cities of the West zone until 23-11-1941.
Hawaii
* GMT-10h since 08-06-1947 for part of archipel, since 1967 for all islands (some islands are in GGMT-11h and others in GMT-12h), GMT-10h30 before 1967 with DST=GMT-9h30.
Hidaho (unified, before 1919)
* Since 01-01-1919 Hidaho state is divided into two time zones, GMT-8h and GMT-7h. You have to choose the good zone for your city. Before 1967 many cities changes time zone but also used DST or not, depend the year. Since 1967 the two zones use DST regular calendar.
Hidaho (zone GMT-8h)
Hidaho (zone GMT-7h)
Illinois (without DST before 1959)
* Choose this if you knows out war time (1918-1919, 1942-1945) the city do not use DST for year you are searching in.
Illinois (with DST before 1959)
* Choose this if you knows out war time (1918-1919, 1942-1945) the city do use DST for year you are searching in.
Louisiana
Montana (1)
* For cities without DST out of 1918-1919 and 1942-1945 period and begin to use regular DST since 1967. Montana (2)
* For cities with exceptional DST out of 1918-1919 and 1942-1945 periods and before 1967. Nevada (cities GMT-8h)
* For the past years many cities of this state passed from GMT-8h to GMT-7h and inverse too. So you have to know which time zone use the city you are looking for in a specific year. We give here the two calendars.
Nevada (cities GMT-7h)
New Hampshire
New Jersey
New Mexico
* DST use for all state but there was cities who did not follow same dates changes before 1967.
New York
* Common DST dates for all state cities after 24-04-1955, before cities used it or not, many with different dates.
Ohio
* All state stand on GMT-6h before 1922, after almost all cities adopt GMT-5h, but some not and also many change from year to year. Same thing for to use DST or not. After 1967 all state follows same calendar.
Oklahoma
Oregon
* Some cities observe daylight saving time before 1975, almost all not (out of war time). You have to know if the city observe it the year you are looking for (to see at the top of the page). GMT-8 for all state but exception for Malheur county who stand on GMT-7h.
Pennsylvania (1)
* For cities that observe daylight saving time before 1965. You have to know if the city observe it the year you are looking for (to see at the top of the page).
Pennsylvania (2)
* For cities that did not observe daylight saving time before 1965.
Porto-Rico
* No DST.
Rhode Island
Texas (zone GMT-7h)
Texas (zone GMT-6h)
Utah
* GMT-8h from 01-01-1900 to 27-04-1969, GMT-7h after.
Vermont
* Common DST dates for all state cities since 1955, before cities used it or not, many with different dates.
West Virginia
* Common DST dates for all state cities since 1966, before cities used it or not, many with different dates.
Virginia
* Common DST dates for all state cities after 1966, before cities used it or not, many with different dates.
Tennessee (West zone GMT-6h)
* Common DST dates for all state cities since 1967, before cities used it or not, many with different dates.
Tennessee (Est zone GMT-5h)
* Same as West zone. All cities in West zone were in GMT before 1919, after this date, at different times, many change for GMT-5h. Texas (West zone GMT-8h)
Texas (Est zone GMT-7h)
Wyoming
* Common DST dates for all state cities after 28-04-1963, before many cities used it or not, with same or different dates.
Washington
* Common DST dates for all state cities after 28-04-1963, before many cities used it or not, with same or different dates.
MIDDLE ORIENT
Albania
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