What value should I pass into TimeZoneInfo.FindSystemTimeZoneById(String)?

Question

I want to use the TimeZoneInfo.FindSystemTimeZoneById(String) method, but I don\'t know what values to use as the input?

Where can I get a list of values for i

Answer 1

You can use that code below

using System;

namespace TimeZoneIds
{
    class Program
    {
        static void Main(string[] args)
        {
            foreach (TimeZoneInfo z in TimeZoneInfo.GetSystemTimeZones())
                Console.WriteLine(z.Id);
        }
    }
}

Answer 2

Like others have said, you can find the list by iterating TimeZoneInfo.GetSystemTimeZones() to find the string you want to use. That said, if you only have information on the time difference (like GMT+9 or GMT-10 ) and cannot find your timezone after iterating the Timezones, you might want to see the following url to see which timezone do you need https://msdn.microsoft.com/en-US/library/ms912391(v=winembedded.11).aspx

Answer 3

The available timezones are:

Console.WriteLine(string.Join("\n",TimeZoneInfo.GetSystemTimeZones().Select(x=>x.Id)));

Result:

Dateline Standard Time
UTC-11
Aleutian Standard Time
Hawaiian Standard Time
Marquesas Standard Time
Alaskan Standard Time
UTC-09
Pacific Standard Time (Mexico)
UTC-08
Pacific Standard Time
US Mountain Standard Time
Mountain Standard Time (Mexico)
Mountain Standard Time
Central America Standard Time
Central Standard Time
Easter Island Standard Time
Central Standard Time (Mexico)
Canada Central Standard Time
SA Pacific Standard Time
Eastern Standard Time (Mexico)
Eastern Standard Time
Haiti Standard Time
Cuba Standard Time
US Eastern Standard Time
Paraguay Standard Time
Atlantic Standard Time
Venezuela Standard Time
Central Brazilian Standard Time
SA Western Standard Time
Pacific SA Standard Time
Turks And Caicos Standard Time
Newfoundland Standard Time
Tocantins Standard Time
E. South America Standard Time
SA Eastern Standard Time
Argentina Standard Time
Greenland Standard Time
Montevideo Standard Time
Saint Pierre Standard Time
Bahia Standard Time
UTC-02
Mid-Atlantic Standard Time
Azores Standard Time
Cape Verde Standard Time
UTC
Morocco Standard Time
GMT Standard Time
Greenwich Standard Time
W. Europe Standard Time
Central Europe Standard Time
Romance Standard Time
Central European Standard Time
W. Central Africa Standard Time
Namibia Standard Time
Jordan Standard Time
GTB Standard Time
Middle East Standard Time
Egypt Standard Time
E. Europe Standard Time
Syria Standard Time
West Bank Standard Time
South Africa Standard Time
FLE Standard Time
Israel Standard Time
Kaliningrad Standard Time
Libya Standard Time
Arabic Standard Time
Turkey Standard Time
Arab Standard Time
Belarus Standard Time
Russian Standard Time
E. Africa Standard Time
Iran Standard Time
Arabian Standard Time
Astrakhan Standard Time
Azerbaijan Standard Time
Russia Time Zone 3
Mauritius Standard Time
Georgian Standard Time
Caucasus Standard Time
Afghanistan Standard Time
West Asia Standard Time
Ekaterinburg Standard Time
Pakistan Standard Time
India Standard Time
Sri Lanka Standard Time
Nepal Standard Time
Central Asia Standard Time
Bangladesh Standard Time
Omsk Standard Time
Myanmar Standard Time
SE Asia Standard Time
Altai Standard Time
W. Mongolia Standard Time
North Asia Standard Time
N. Central Asia Standard Time
Tomsk Standard Time
China Standard Time
North Asia East Standard Time
Singapore Standard Time
W. Australia Standard Time
Taipei Standard Time
Ulaanbaatar Standard Time
North Korea Standard Time
Aus Central W. Standard Time
Transbaikal Standard Time
Tokyo Standard Time
Korea Standard Time
Yakutsk Standard Time
Cen. Australia Standard Time
AUS Central Standard Time
E. Australia Standard Time
AUS Eastern Standard Time
West Pacific Standard Time
Tasmania Standard Time
Vladivostok Standard Time
Lord Howe Standard Time
Bougainville Standard Time
Russia Time Zone 10
Magadan Standard Time
Norfolk Standard Time
Sakhalin Standard Time
Central Pacific Standard Time
Russia Time Zone 11
New Zealand Standard Time
UTC+12
Fiji Standard Time
Kamchatka Standard Time
Chatham Islands Standard Time
Tonga Standard Time
Samoa Standard Time
Line Islands Standard Time

Answer 4

A method to cnvert from one time zone to another:

DateTime n = TimeZoneInfo.ConvertTimeBySystemTimeZoneId(datetime, "sourceTimeZoneId", "destinationTimeZoneId");

I'm on Win10, and I list Time Zone Id with time difference:

Dateline Standard Time                  -12
UTC-11                                  -11
Hawaiian Standard Time                  -10
Aleutian Standard Time                  -9
Marquesas Standard Time                 -9
UTC-09                                  -9
Alaskan Standard Time                   -8
UTC-08                                  -8
Pacific Standard Time (Mexico)          -7
Pacific Standard Time                   -7
US Mountain Standard Time               -7
Mountain Standard Time (Mexico)         -6
Mountain Standard Time                  -6
Central America Standard Time           -6
Easter Island Standard Time             -6
Canada Central Standard Time            -6
Central Standard Time                   -5
Central Standard Time (Mexico)          -5
SA Pacific Standard Time                -5
Eastern Standard Time (Mexico)          -5
Eastern Standard Time                   -4
Haiti Standard Time                     -4
Cuba Standard Time                      -4
US Eastern Standard Time                -4
Turks And Caicos Standard Time          -4
Paraguay Standard Time                  -4
Venezuela Standard Time                 -4
Central Brazilian Standard Time         -4
SA Western Standard Time                -4
Pacific SA Standard Time                -4
Atlantic Standard Time                  -3
Tocantins Standard Time                 -3
E. South America Standard Time          -3
SA Eastern Standard Time                -3
Argentina Standard Time                 -3
Montevideo Standard Time                -3
Magallanes Standard Time                -3
Bahia Standard Time                     -3
Newfoundland Standard Time              -2
Greenland Standard Time                 -2
Saint Pierre Standard Time              -2
UTC-02                                  -2
Mid-Atlantic Standard Time              -1
Cape Verde Standard Time                -1
Azores Standard Time                    0
UTC                                     0
Greenwich Standard Time                 0
Sao Tome Standard Time                  0
GMT Standard Time                       +1
Morocco Standard Time                   +1
W. Central Africa Standard Time         +1
W. Europe Standard Time                 +2
Central Europe Standard Time            +2
Romance Standard Time                   +2
Central European Standard Time          +2
Egypt Standard Time                     +2
South Africa Standard Time              +2
Kaliningrad Standard Time               +2
Sudan Standard Time                     +2
Libya Standard Time                     +2
Namibia Standard Time                   +2
Jordan Standard Time                    +3
GTB Standard Time                       +3
Middle East Standard Time               +3
E. Europe Standard Time                 +3
Syria Standard Time                     +3
West Bank Standard Time                 +3
FLE Standard Time                       +3
Israel Standard Time                    +3
Arabic Standard Time                    +3
Turkey Standard Time                    +3
Arab Standard Time                      +3
Belarus Standard Time                   +3
Russian Standard Time                   +3
E. Africa Standard Time                 +3
Iran Standard Time                      +4
Arabian Standard Time                   +4
Astrakhan Standard Time                 +4
Azerbaijan Standard Time                +4
Russia Time Zone 3                      +4
Mauritius Standard Time                 +4
Saratov Standard Time                   +4
Georgian Standard Time                  +4
Volgograd Standard Time                 +4
Caucasus Standard Time                  +4
Afghanistan Standard Time               +4
West Asia Standard Time                 +5
Ekaterinburg Standard Time              +5
Pakistan Standard Time                  +5
Qyzylorda Standard Time                 +5
India Standard Time                     +5
Sri Lanka Standard Time                 +5
Nepal Standard Time                     +5
Central Asia Standard Time              +6
Bangladesh Standard Time                +6
Omsk Standard Time                      +6
Myanmar Standard Time                   +6
SE Asia Standard Time                   +7
Altai Standard Time                     +7
W. Mongolia Standard Time               +7
North Asia Standard Time                +7
N. Central Asia Standard Time           +7
Tomsk Standard Time                     +7
China Standard Time                     +8
North Asia East Standard Time           +8
Singapore Standard Time                 +8
W. Australia Standard Time              +8
Taipei Standard Time                    +8
Ulaanbaatar Standard Time               +8
Aus Central W. Standard Time            +8
Transbaikal Standard Time               +9
Tokyo Standard Time                     +9
North Korea Standard Time               +9
Korea Standard Time                     +9
Yakutsk Standard Time                   +9
Cen. Australia Standard Time            +9
AUS Central Standard Time               +9
E. Australia Standard Time              +10
AUS Eastern Standard Time               +10
West Pacific Standard Time              +10
Tasmania Standard Time                  +10
Vladivostok Standard Time               +10
Lord Howe Standard Time                 +10
Bougainville Standard Time              +11
Russia Time Zone 10                     +11
Magadan Standard Time                   +11
Norfolk Standard Time                   +11
Sakhalin Standard Time                  +11
Central Pacific Standard Time           +11
Russia Time Zone 11                     +12
New Zealand Standard Time               +12
UTC+12                                  +12
Fiji Standard Time                      +12
Chatham Islands Standard Time           +12
Kamchatka Standard Time                 +13
UTC+13                                  +13
Tonga Standard Time                     +13
Samoa Standard Time                     +13
Line Islands Standard Time              +14

Code to get time difference:

DateTime dt = Convert.ToDateTime("2020-04-17T09:00:00");
Dictionary<string, int> zoneHour = new Dictionary<string, int>();
var infos = TimeZoneInfo.GetSystemTimeZones();
foreach (var info in infos)
{
    zoneHour.Add(info.Id,
        TimeZoneInfo.ConvertTimeBySystemTimeZoneId(dt, "UTC", info.Id).Subtract(dt).Hours
    );
}

var zoneHourOrder = zoneHour.OrderBy(z => z.Value);
foreach (var kv in zoneHourOrder)
{
    Console.WriteLine(kv.Key.PadRight(40) + (kv.Value > 0 ? "+" + kv.Value : kv.Value.ToString()));
}