World Map with 552 Timezones and Daylight Saving Time

• This version of the software (all files) is released into the public domain.
• The software is provided "as it" without any warranty, express or implied.

The software provide the entire history of DST for all time zones, and a SVG world map with all time zones displaying their next seasonal transition on mouseover. The source code is only 20KB when compressed. You can check the live examples.

• Precision:

  • The function that detect seasonal transition is precise to the second.

• Compatibility:

  • Node.js: The function is fully compatible with Node.js, allowing for server or browser use.
  • Browser Support: Works across many modern browsers that support the Intl object.
  • Polyfill: A polyfill is provided to ensure compatibility with environments that don't support Intl.

Function Definition

• Parameters:

  • timeZone: A string representing the time zone to check, e.g., 'America/Denver'.
  • dateFrom (optional): The start date for checking DST transitions. Defaults to the current date.
  • dateEnd (optional): The end date for checking DST transitions. Defaults to one year after dateFrom.

• Return Value:

  • The function is a generator that yields as an integer the last millisecond before each DST transition within the specified date range.

How the function works ?

By using a generator, the getDSTTransitions function optimizes resource use and offers flexibility in how results are retrieved.

1. Checking the Time at the Start of Each Month

The algorithm begins by checking the formatted time (HH:MM:SS) at the start of each month within the specified date range. This is done using the Intl.DateTimeFormat formatter for the given time zone.

2. Detecting a DST Change

The function compares the formatted time of two consecutive months. If there's a difference in the time between two months, it indicates that a DST transition has occurred.

3. Finding the Exact Moment with a Binary Search

Once a DST change is detected, the algorithm uses a binary search to efficiently narrow down the exact second when the time change occurred. This step ensures that the function is precise to the exact second of the transition.

4. Yielding the Result

After pinpointing the exact moment of the DST change, the function yields the corresponding timestamp, which is the last millisecond before a clock jump. If you're only interested in the first result, you can stop here, or you can continue iterating to find all transitions within the specified date range.

3. Basic Usage

The provided example files should give users a clear starting point for integrating this functionality into your own project.

Example 1: Listing DST Transitions for a Specific Time Zone

• Scenario: Detecting the next DST transitions for America/Denver.

const timeZone = 'America/Denver'
for (const unix_ms of getDSTTransitions(timeZone)) {
	const s_1 = new Date(unix_ms).toLocaleString([], {timeZone})
	const s_2 = new Date(unix_ms + 1).toLocaleString([], {timeZone})
	console.log(s_1, ' to ', s_2)
}

Example 2: Show the next DST Transition for a Specific Time Zone

• Scenario: Get the last millisecond before a time change for America/Denver.

const tz_name = 'America/Denver'
const ms = getDSTTransitions(tz_name).next().value

// You can use a formatter to display the date information
const opts = {
	timeZone: tz_name,
	year: 'numeric',
	month: '2-digit',
	day: '2-digit',
	hour: '2-digit',
	minute: '2-digit',
	second: '2-digit',
	hourCycle: 'h23',
}
const formatter = new Intl.DateTimeFormat('en-US', opts)
console.log(formatter.format(ms), ' to ', formatter.format(ms + 1))

History of DST - Data Source

The Intl.DateTimeFormat API in JavaScript relies on the underlying system's time zone database, often based on the IANA Time Zone Database (also known as the tz database). This database contains historical time zone information, but its accuracy can vary, especially for dates far in the past.

The underlying system (for example Windows and Firefox) may interpret or apply historical time zone shifts differently than expected.

Geocode dataset

552 IANA timezones have been geocoded to provide the SVG World Map of Timezones.

IANA TimeZone	Latitude	Longitude
Indian/Cocos	-12.155	96.868
Cuba	22.011	-78.658
PST8PDT	43.214	-123.343
America/Recife	-8.044	-34.926
Australia/South	-30.286	135.426
Europe/Luxembourg	49.753	6.095
Pacific/Funafuti	-8.521	179.198
Antarctica/South_Pole	-90	0
Africa/Harare	-17.834	31.045
Africa/Djibouti	11.741	42.492
Antarctica/Palmer	-64.774	-64.054
America/Tortola	18.433	-64.633
Europe/Vienna	48.202	16.379
Asia/Beirut	33.894	35.499
America/Cuiaba	-15.607	-56.05
Atlantic/Bermuda	32.304	-64.754
America/Indiana/Marengo	38.371	-86.344
Japan	36.663	138.093
Europe/Belfast	54.597	-5.934
America/Thunder_Bay	48.418	-89.297
Australia/North	-20.092	133.476
Atlantic/Faroe	62.032	-6.765
America/Jujuy	-23.264	-65.712
Chile/Continental	-35.675	-71.543
America/St_Thomas	18.338	-64.894
Asia/Almaty	43.224	76.93
Asia/Chita	52.053	113.473
America/Antigua	17.075	-61.812
America/Inuvik	71.987	-125.251
America/Goose_Bay	53.314	-60.421
Libya	26.335	17.228
America/Cancun	21.162	-86.858
Antarctica/Davis	-68.577	77.968
Pacific/Port_Moresby	-9.443	147.182
Africa/Mogadishu	2.049	45.326
Europe/Amsterdam	52.373	4.881
Atlantic/South_Georgia	-54.364	-36.65
America/Pangnirtung	66.148	-65.697
Australia/Victoria	-37.121	144.526
America/Punta_Arenas	-53.15	-70.911
Europe/Samara	53.223	50.21
Australia/ACT	-35.496	148.976
Atlantic/Madeira	32.758	-16.958
America/Anchorage	61.164	-149.215
Pacific/Wallis	-14.309	-178.123
Asia/Dili	-8.56	125.572
Asia/Irkutsk	52.288	104.301
America/St_Johns	47.488	-52.804
Europe/Jersey	49.218	-2.127
Antarctica/Troll	-72.012	2.534
Pacific/Gambier	-23.122	-134.969
Europe/Prague	50.075	14.45
Antarctica/McMurdo	-77.841	166.675
Antarctica/Macquarie	-54.5	158.936
Australia/Queensland	-22.835	144.469
America/Argentina/Cordoba	-32.204	-63.622
Asia/Dacca	23.79	90.411
America/Indiana/Petersburg	38.492	-87.279
America/Lower_Princes	18.048	-63.047
America/Indiana/Vincennes	38.676	-87.514
America/Rosario	-32.954	-60.695
America/Argentina/ComodRivadavia	-45.836	-67.498
Iceland	64.963	-19.021
America/Guatemala	15.783	-90.231
Asia/Qyzylorda	44.834	65.526
America/Panama	8.538	-80.782
America/Managua	12.112	-86.245
America/North_Dakota/New_Salem	46.844	-101.417
Navajo	36.067	-109.188
Poland	51.919	19.145
Asia/Harbin	45.761	126.643
America/Blanc-Sablon	51.508	-57.202
America/Manaus	-3.053	-59.989
America/Rankin_Inlet	62.825	-92.128
US/Mountain	47.53	-112.686
EST	42.115	-75.907
US/Samoa	-14.283	-170.71
America/Argentina/Catamarca	-28.466	-65.778
Europe/Zurich	47.386	8.523
Brazil/West	-15.228	-55.286
America/Buenos_Aires	-34.605	-58.424
Africa/Ndjamena	12.121	15.055
Asia/Taipei	25.065	121.55
America/Noronha	-3.855	-32.424
Pacific/Guadalcanal	-9.638	160.216
America/Bahia_Banderas	20.82	-105.297
Asia/Dhaka	23.785	90.412
MST	42.363	-107.444
Europe/Tallinn	59.416	24.745
Europe/Podgorica	42.435	19.261
America/Argentina/Jujuy	-23.144	-65.822
America/Puerto_Rico	18.202	-66.486
Europe/Vaduz	47.147	9.525
Singapore	1.359	103.801
Europe/Athens	37.988	23.732
Europe/Berlin	52.51	13.399
Turkey	38.77	35.289
America/Ojinaga	29.546	-104.413
Europe/Moscow	55.757	37.617
America/Jamaica	18.11	-77.298
Portugal	39.4	-8.225
Pacific/Midway	28.21	-177.376
Pacific/Chuuk	7.413	151.843
Australia/Yancowinna	-31.816	141.911
Asia/Famagusta	35.114	33.933
America/Los_Angeles	34.074	-118.4
Asia/Bahrain	26.106	50.547
Europe/Copenhagen	55.676	12.567
America/Kentucky/Louisville	38.193	-85.672
America/Argentina/Buenos_Aires	-34.609	-58.438
America/Coral_Harbour	64.138	-83.163
Indian/Reunion	-21.136	55.472
America/Asuncion	-25.287	-57.597
America/Lima	-12.045	-77.039
Pacific/Apia	-13.83	-171.769
Canada/Yukon	63.294	-136.057
America/Argentina/Salta	-24.659	-64.527
Asia/Choibalsan	48.084	114.546
Pacific/Chatham	-43.932	-176.527
Australia/Canberra	-35.281	149.129
US/Aleutian	54.147	-165.608
Antarctica/Casey	-66.282	110.527
Africa/Bissau	12.045	-14.904
Pacific/Kwajalein	9.396	167.474
Africa/Algiers	36.731	3.085
America/Ensenada	31.865	-116.601
Africa/Porto-Novo	6.492	2.623
Europe/Paris	48.857	2.345
America/North_Dakota/Center	47.115	-101.298
America/Bogota	4.662	-74.097
America/Knox_IN	41.29	-86.622
Africa/Bamako	12.598	-7.988
America/Merida	20.97	-89.625
Africa/El_Aaiun	27.138	-13.19
America/Montserrat	16.743	-62.187
America/Fort_Nelson	58.805	-122.693
Africa/Gaborone	-24.628	25.934
Asia/Jerusalem	31.769	35.215
US/Michigan	43.379	-84.66
America/Porto_Velho	-8.766	-63.874
Europe/Sofia	42.689	23.334
Asia/Thimbu	27.468	89.637
Africa/Brazzaville	-4.266	15.248
America/Kralendijk	12.19	-68.264
Africa/Douala	4.047	9.76
America/Marigot	18.068	-63.082
Europe/Simferopol	44.953	34.102
America/Iqaluit	63.747	-68.517
America/Dominica	15.409	-61.346
WET	40.705	-7.949
America/Araguaina	-7.191	-48.207
America/Chicago	41.836	-87.68
Africa/Ouagadougou	12.368	-1.531
Asia/Khandyga	62.656	135.556
Africa/Lome	6.15	1.23
Africa/Sao_Tome	0.254	6.631
Europe/Kiev	50.446	30.554
Africa/Asmera	15.332	38.93
Pacific/Easter	-27.153	-109.435
Australia/Darwin	-12.433	130.923
Pacific/Pitcairn	-25.066	-130.101
America/Tijuana	32.487	-116.984
Brazil/East	-8.609	-41.283
Pacific/Wake	19.28	166.65
America/Mendoza	-34.266	-68.644
Asia/Bangkok	13.774	100.607
Asia/Magadan	59.557	150.812
Africa/Bangui	4.376	18.57
America/Costa_Rica	9.935	-84.087
GB-Eire	52.987	-8.019
Europe/Monaco	43.737	7.421
Europe/Helsinki	60.17	24.938
Europe/Malta	35.889	14.445
MST7MDT	35.106	-106.629
America/Whitehorse	60.717	-135.08
Pacific/Tarawa	1.498	173.017
Asia/Vientiane	17.976	102.633
Africa/Monrovia	6.308	-10.803
Canada/Eastern	48.981	-76.468
Africa/Kinshasa	-4.397	15.307
America/Indianapolis	39.768	-86.16
America/Resolute	74.716	-94.978
America/North_Dakota/Beulah	47.267	-101.78
America/Yellowknife	62.453	-114.37
America/Louisville	38.246	-85.752
America/Grand_Turk	21.428	-71.142
Asia/Makassar	-5.153	119.437
Asia/Riyadh	24.714	46.762
US/Alaska	65.171	-152.089
America/Porto_Acre	-9.594	-67.541
GB	54.524	-2.318
Asia/Kolkata	22.559	88.366
Canada/Saskatchewan	54.544	-105.814
America/Curacao	12.122	-68.93
Europe/Isle_of_Man	54.232	-4.521
America/Mazatlan	23.25	-106.411
Asia/Ashkhabad	37.97	58.298
Africa/Johannesburg	-26.2	28.03
America/Dawson	64.061	-139.437
Asia/Tehran	35.712	51.336
America/Argentina/Ushuaia	-54.802	-68.303
America/Boise	43.603	-116.206
America/Atka	52.209	-174.203
Africa/Kigali	-1.959	30.117
Pacific/Kiritimati	1.984	-157.474
Pacific/Niue	-19.064	-169.857
America/Toronto	43.73	-79.449
Eire	53.09	-7.908
Asia/Ulan_Bator	47.917	106.917
Africa/Tunis	36.806	10.18
Atlantic/Cape_Verde	15.074	-23.629
Africa/Asmara	15.332	38.93
Asia/Hebron	31.532	35.101
US/Central	36.998	-94.612
Africa/Freetown	8.487	-13.236
America/Indiana/Tell_City	37.95	-86.765
Australia/Melbourne	-37.851	145.12
Chile/EasterIsland	-27.123	-109.358
Europe/Bucharest	44.435	26.102
America/Atikokan	48.759	-91.614
Asia/Oral	51.228	51.386
Asia/Dushanbe	38.561	68.773
America/Halifax	44.65	-63.637
Pacific/Saipan	15.185	145.745
US/Hawaii	21.454	-157.99
Europe/Guernsey	49.452	-2.583
Africa/Ceuta	35.887	-5.331
Europe/Skopje	41.996	21.441
Europe/Chisinau	47.016	28.846
Asia/Karachi	24.99	67.181
Indian/Mahe	-4.707	55.501
Arctic/Longyearbyen	78.22	15.641
America/St_Vincent	13.26	-61.19
Indian/Mayotte	-12.819	45.154
Asia/Yekaterinburg	56.836	60.613
Asia/Jakarta	-6.204	106.828
Asia/Tokyo	35.706	139.655
Africa/Nairobi	-1.275	36.812
Asia/Sakhalin	50.523	142.711
America/Sitka	57.132	-135.058
Pacific/Galapagos	-0.628	-90.388
Pacific/Enderbury	-3.131	-171.086
Africa/Niamey	13.509	2.114
America/Menominee	45.113	-87.624
Europe/Uzhgorod	48.618	22.289
Kwajalein	8.723	167.735
Australia/Hobart	-42.881	147.326
America/Argentina/Rio_Gallegos	-51.629	-69.259
US/Eastern	32.843	-83.63
Asia/Macao	22.191	113.55
America/Scoresbysund	70.486	-21.964
Atlantic/Faeroe	62.156	-7.078
Asia/Aqtobe	50.289	57.205
Europe/Zaporozhye	47.834	35.17
America/Belem	-1.389	-48.462
Europe/Lisbon	38.738	-9.156
America/Indiana/Indianapolis	39.783	-86.142
Atlantic/Stanley	-51.694	-57.86
America/Guyana	4.917	-59.45
America/Santiago	-33.478	-70.642
Australia/Eucla	-31.759	128.555
Asia/Aden	12.786	45.012
Pacific/Guam	13.444	144.768
Europe/London	51.511	-0.119
Asia/Tel_Aviv	32.08	34.781
Pacific/Kosrae	5.31	162.975
Pacific/Yap	9.535	138.109
Antarctica/Mawson	-67.603	62.874
America/St_Barthelemy	17.895	-62.828
Indian/Chagos	-6.67	71.337
Pacific/Truk	7.446	151.842
Mexico/General	19.358	-99.153
America/Yakutat	59.509	-139.659
America/Maceio	-9.602	-35.728
Asia/Aqtau	43.639	51.256
Indian/Christmas	-10.493	105.635
Hongkong	22.377	114.179
Asia/Saigon	10.751	106.659
Europe/Kyiv	50.42	30.548
America/Argentina/La_Rioja	-29.42	-66.861
EST5EDT	35.397	-78.002
Atlantic/Canary	28.298	-16.51
America/Cayenne	4.933	-52.31
America/Montreal	45.516	-73.643
Europe/Vatican	41.904	12.452
Asia/Jayapura	-2.606	140.669
America/Miquelon	47.098	-56.381
PRC	34.541	108.936
America/Grenada	12.137	-61.69
Pacific/Auckland	-36.89	174.76
America/Eirunepe	-6.662	-69.868
Africa/Lagos	6.46	3.315
HST	19.692	-155.48
ROC	23.988	120.974
Europe/Sarajevo	43.861	18.401
America/Fort_Wayne	41.077	-85.139
EET	49.239	28.493
Asia/Colombo	6.912	79.865
America/Indiana/Winamac	41.051	-86.604
Pacific/Noumea	-22.268	166.456
Asia/Kuala_Lumpur	3.135	101.695
America/Guadeloupe	16.297	-61.441
Africa/Bujumbura	-3.361	29.368
Asia/Istanbul	41.009	29.062
Antarctica/Vostok	-78.464	106.834
Asia/Pontianak	-0.035	109.333
Canada/Central	53.874	-92.177
ROK	36.444	127.874
Atlantic/Azores	37.779	-25.494
Pacific/Fiji	-17.852	177.895
Europe/Mariehamn	60.097	19.939
Europe/San_Marino	43.939	12.459
America/Shiprock	36.785	-108.685
America/Cayman	19.291	-81.374
Africa/Lubumbashi	-11.67	27.495
Pacific/Palau	7.464	134.56
Europe/Budapest	47.476	19.099
Asia/Yerevan	40.15	44.519
Africa/Libreville	0.408	9.469
America/Caracas	10.461	-66.912
Asia/Ho_Chi_Minh	10.749	106.66
Pacific/Fakaofo	-9.386	-171.247
Jamaica	18.15	-77.314
America/Tegucigalpa	14.071	-87.198
Indian/Comoro	-11.703	43.255
Asia/Atyrau	47.105	51.929
Asia/Baku	40.408	49.874
America/Campo_Grande	-20.468	-54.613
Indian/Maldives	4.217	73.541
Africa/Conakry	9.643	-13.587
Asia/Kathmandu	27.71	85.322
Africa/Blantyre	-15.784	35.023
America/St_Lucia	13.93	-60.972
America/Creston	49.099	-116.514
Europe/Vilnius	54.681	25.273
America/Port-au-Prince	18.574	-72.301
Egypt	25.7	28.912
Asia/Tomsk	56.501	85
America/La_Paz	-16.499	-68.116
Australia/Lindeman	-20.448	149.041
Asia/Yakutsk	62.028	129.703
Europe/Rome	41.898	12.497
America/Cambridge_Bay	69.118	-105.058
America/Nipigon	49.014	-88.266
Asia/Qostanay	53.219	63.606
Africa/Dar_es_Salaam	-6.826	39.197
America/Denver	39.729	-104.96
America/Havana	23.064	-82.339
Africa/Kampala	0.319	32.582
Asia/Hovd	47.986	91.639
Africa/Abidjan	5.354	-4.002
Europe/Busingen	47.698	8.69
Asia/Srednekolymsk	67.456	153.704
America/Rio_Branco	-9.976	-67.827
America/Mexico_City	19.341	-99.137
Europe/Tiraspol	46.848	29.613
America/Virgin	17.729	-64.774
Antarctica/Syowa	-69.004	39.582
Indian/Mauritius	-20.299	57.536
Africa/Maseru	-29.366	27.514
Pacific/Marquesas	-9.763	-139
Asia/Qatar	25.305	51.197
NZ	-41.324	174.775
America/Santa_Isabel	32.63	-115.573
Australia/Lord_Howe	-31.554	159.087
America/Catamarca	-27.654	-67.031
Asia/Samarkand	39.656	66.962
Asia/Brunei	4.527	114.575
Asia/Novosibirsk	54.995	82.87
America/Argentina/Tucuman	-26.825	-65.232
America/Bahia	-12.393	-41.918
America/Santo_Domingo	18.484	-69.941
America/Moncton	46.101	-64.811
Europe/Belgrade	44.794	20.448
Antarctica/DumontDUrville	-66.663	140.003
America/Indiana/Vevay	38.748	-85.067
Pacific/Majuro	7.148	171.031
America/Anguilla	18.216	-63.052
America/Ciudad_Juarez	31.665	-106.427
America/Juneau	58.303	-134.417
Europe/Ulyanovsk	54.291	48.255
Asia/Hong_Kong	22.375	114.188
Europe/Kirov	58.581	49.659
Africa/Dakar	14.723	-17.458
Asia/Omsk	54.973	73.389
Europe/Madrid	40.422	-3.68
America/Regina	50.447	-104.618
Europe/Warsaw	52.232	21.021
Africa/Luanda	-8.847	13.281
America/Indiana/Knox	41.291	-86.621
Australia/West	-26.304	121.921
Australia/Broken_Hill	-31.956	141.47
Asia/Kabul	34.532	69.175
America/Winnipeg	49.888	-97.14
America/Danmarkshavn	76.773	-18.677
Pacific/Tongatapu	-21.138	-175.203
US/Indiana-Starke	41.288	-86.621
America/Nassau	25.044	-77.35
Europe/Dublin	53.343	-6.272
Asia/Kamchatka	53.159	158.432
Europe/Zagreb	45.806	15.992
Asia/Ulaanbaatar	47.913	106.855
America/Chihuahua	28.623	-106.029
Asia/Ujung_Pandang	-5.151	119.454
Africa/Tripoli	32.884	13.191
Iran	33.074	55.579
Africa/Timbuktu	16.773	-3.004
America/Phoenix	33.462	-112.108
Asia/Vladivostok	43.12	131.932
Africa/Nouakchott	18.079	-15.965
America/Argentina/San_Juan	-30.986	-68.803
Africa/Maputo	-25.899	32.6
Pacific/Rarotonga	-21.205	-159.794
Asia/Macau	22.191	113.545
Atlantic/St_Helena	-15.934	-5.72
Africa/Lusaka	-15.413	28.304
Australia/Brisbane	-27.485	153.04
Asia/Rangoon	16.853	96.167
America/New_York	40.713	-73.872
Asia/Gaza	31.502	34.468
Asia/Ashgabat	37.955	58.374
Mexico/BajaNorte	29.947	-115.038
Africa/Juba	4.855	31.58
Mexico/BajaSur	25.255	-111.775
America/Dawson_Creek	55.752	-120.237
America/Monterrey	25.681	-100.314
Pacific/Pohnpei	6.98	158.203
Asia/Bishkek	42.877	74.588
America/Montevideo	-34.841	-56.197
Africa/Accra	5.589	-0.182
Asia/Shanghai	31.048	121.452
Europe/Ljubljana	46.063	14.513
Asia/Manila	14.6	120.991
Asia/Tbilisi	41.724	44.8
Australia/LHI	-31.554	159.087
America/Barbados	13.165	-59.554
Brazil/DeNoronha	-3.857	-32.427
Asia/Baghdad	33.315	44.366
Australia/Sydney	-33.843	151.044
Asia/Barnaul	53.349	83.762
America/Nome	64.5	-165.407
Europe/Minsk	53.901	27.559
Canada/Atlantic	53.536	-63.999
Europe/Brussels	50.846	4.35
Pacific/Kanton	-2.769	-171.718
Australia/Perth	-31.968	115.889
Africa/Casablanca	33.56	-7.594
Africa/Windhoek	-22.57	17.077
Antarctica/Rothera	-67.569	-68.124
Europe/Tirane	41.328	19.818
Asia/Kuwait	29.338	47.63
America/Detroit	42.35	-83.099
NZ-CHAT	-43.925	-176.525
Asia/Urumqi	43.812	87.599
Europe/Andorra	42.518	1.555
Asia/Amman	31.901	35.938
America/Port_of_Spain	10.665	-61.509
America/Matamoros	25.853	-97.505
Indian/Kerguelen	-49.349	70.22
Africa/Banjul	13.452	-16.577
Pacific/Pago_Pago	-14.276	-170.706
Europe/Istanbul	40.996	29.116
Pacific/Samoa	-13.84	-171.76
Asia/Thimphu	27.467	89.638
Atlantic/Jan_Mayen	70.922	-8.717
CST6CDT	36.533	-94.598
Asia/Muscat	23.575	58.383
Asia/Tashkent	41.299	69.256
Asia/Chungking	29.563	106.453
Asia/Yangon	16.853	96.167
Africa/Khartoum	15.53	32.542
Canada/Pacific	49.207	-119.818
Asia/Pyongyang	39.067	125.788
Pacific/Honolulu	21.29	-157.816
Pacific/Efate	-17.729	168.316
Asia/Novokuznetsk	53.757	87.119
America/Aruba	12.516	-69.981
Atlantic/Reykjavik	64.125	-21.848
America/Hermosillo	29.084	-110.959
Europe/Bratislava	48.131	17.13
Pacific/Ponape	6.963	158.211
America/Edmonton	53.498	-113.522
America/Metlakatla	55.124	-131.57
Brazil/Acre	-8.874	-70.594
America/Rainy_River	48.722	-94.567
Pacific/Johnston	16.728	-169.534
America/Santarem	-2.447	-54.713
Asia/Nicosia	35.179	33.376
America/Sao_Paulo	-23.569	-46.672
Asia/Kuching	1.569	110.321
Africa/Cairo	30.048	31.239
Australia/Tasmania	-42.168	146.487
Asia/Damascus	33.507	36.299
Europe/Volgograd	48.696	44.469
Asia/Chongqing	29.584	106.561
America/Belize	17.249	-88.775
Africa/Addis_Ababa	9.011	38.759
Europe/Gibraltar	36.13	-5.347
Europe/Nicosia	35.182	33.386
US/Pacific	41.735	-122.635
America/Fortaleza	-3.779	-38.545
America/Nuuk	64.173	-51.738
America/Adak	51.867	-176.639
Europe/Kaliningrad	54.711	20.495
Asia/Krasnoyarsk	56.019	92.876
America/Boa_Vista	2.812	-60.712
US/East-Indiana	40.023	-85.19
America/Martinique	14.672	-61.023
Asia/Dubai	25.181	55.315
CET	46.601	4.069
Europe/Astrakhan	46.34	48.021
W-SU	58.535	36.392
Pacific/Norfolk	-29.034	167.953
America/Vancouver	49.233	-123.102
Israel	31.626	34.758
America/Glace_Bay	46.197	-59.957
Asia/Seoul	37.561	126.989
Asia/Phnom_Penh	11.563	104.871
Pacific/Bougainville	-6.38	155.434
America/Thule	77.468	-69.231
America/El_Salvador	13.777	-89.206
Indian/Antananarivo	-18.9	47.52
America/Guayaquil	-2.174	-79.915
Asia/Ust-Nera	64.568	143.235
America/Kentucky/Monticello	36.83	-84.849
America/Argentina/San_Luis	-33.297	-66.335
Asia/Kashgar	39.479	76.013
Canada/Newfoundland	53.532	-64.007
Pacific/Tahiti	-17.532	-149.556
America/St_Kitts	17.297	-62.724
America/Swift_Current	50.282	-107.797
Europe/Saratov	51.564	45.991
Europe/Riga	56.956	24.121
America/Godthab	64.175	-51.738
Europe/Stockholm	59.302	18.02
America/Cordoba	-31.409	-64.184
Australia/Currie	-39.93	143.854
Australia/NSW	-33.089	147.147
Pacific/Nauru	-0.527	166.935
America/Argentina/Mendoza	-32.884	-68.861
Asia/Singapore	1.349	103.792
Africa/Malabo	3.748	8.775
MET	44.936	8.572
America/Paramaribo	5.842	-55.201
Europe/Oslo	59.926	10.776
Canada/Mountain	55.759	-120.225
Australia/Adelaide	-34.909	138.577
Africa/Mbabane	-26.323	31.144
Asia/Anadyr	64.733	177.501
Asia/Calcutta	22.524	88.352
US/Arizona	34.329	-112.121
Asia/Katmandu	27.706	85.323

For example you can use https://maps.googleapis.com/maps/api/geocode/json?address=27.706,85.323&key=API_KEY to programatically get more informations about Kathmandu, Nepal.