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- CST to GMT to Johannesburg, South Africa to Dublin, Ireland to Tunis, Tunisia
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CDT/CST
Central Daylight Time
GMT -5
CST automatically adjusted to CDT time zone, that is in use
GMT
Greenwich Mean Time
GMT +0
Johannesburg
South Africa
SAST
Dublin
Ireland
IST
Tunis
Tunisia
CET
Time Difference
Central Daylight Time is 5 hours behind Greenwich Mean Time and 7 hours behind SAST (South Africa Standard Time) and 6 hours behind IST (Irish Standard Time) and 6 hours behind CET (Central European Time)
7:00 am07:00 in CDT is 12:00 pm12:00 in GMT and is 2:00 pm14:00 in Johannesburg, South Africa and is 1:00 pm13:00 in Dublin, Ireland and is 1:00 pm13:00 in Tunis, Tunisia
CST to GMT call time
Best time for a conference call or a meeting is between 8am-12pm in CST which corresponds to 2pm-6pm in GMT
CST to Johannesburg call time
Best time for a conference call or a meeting is between 8am-10am in CST which corresponds to 4pm-6pm in Johannesburg
CST to Dublin call time
Best time for a conference call or a meeting is between 8am-11am in CST which corresponds to 3pm-6pm in Dublin
CST to Tunis call time
Best time for a conference call or a meeting is between 8am-11am in CST which corresponds to 3pm-6pm in Tunis
7:00 am07:00 Central Daylight Time (CDT). Offset UTC -5:00 hours
12:00 pm12:00 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
2:00 pm14:00 SAST (South Africa Standard Time) (Johannesburg, South Africa). Offset UTC +2:00 hours
1:00 pm13:00 IST (Irish Standard Time) (Dublin, Ireland). Offset UTC +1:00 hour
1:00 pm13:00 CET (Central European Time) (Tunis, Tunisia). Offset UTC +1:00 hour
7:00 am07:00 CDT / 12:00 pm12:00 GMT / 2:00 pm14:00 Johannesburg, South Africa / 1:00 pm13:00 Dublin, Ireland / 1:00 pm13:00 Tunis, Tunisia
| CDT | GMT | Johannesburg, South Africa | Dublin, Ireland | Tunis, Tunisia |
|---|---|---|---|---|
| 12am (midnight) | 5am | 7am | 6am | 6am |
| 1am | 6am | 8am | 7am | 7am |
| 2am | 7am | 9am | 8am | 8am |
| 3am | 8am | 10am | 9am | 9am |
| 4am | 9am | 11am | 10am | 10am |
| 5am | 10am | 12pm (noon) | 11am | 11am |
| 6am | 11am | 1pm | 12pm (noon) | 12pm (noon) |
| 7am | 12pm (noon) | 2pm | 1pm | 1pm |
| 8am | 1pm | 3pm | 2pm | 2pm |
| 9am | 2pm | 4pm | 3pm | 3pm |
| 10am | 3pm | 5pm | 4pm | 4pm |
| 11am | 4pm | 6pm | 5pm | 5pm |
| 12pm (noon) | 5pm | 7pm | 6pm | 6pm |
| 1pm | 6pm | 8pm | 7pm | 7pm |
| 2pm | 7pm | 9pm | 8pm | 8pm |
| 3pm | 8pm | 10pm | 9pm | 9pm |
| 4pm | 9pm | 11pm | 10pm | 10pm |
| 5pm | 10pm | 12am (midnight) | 11pm | 11pm |
| 6pm | 11pm | 1am | 12am (midnight) | 12am (midnight) |
| 7pm | 12am (midnight) | 2am | 1am | 1am |
| 8pm | 1am | 3am | 2am | 2am |
| 9pm | 2am | 4am | 3am | 3am |
| 10pm | 3am | 5am | 4am | 4am |
| 11pm | 4am | 6am | 5am | 5am |
| 0:00 | 5:00 | 7:00 | 6:00 | 6:00 |
| 1:00 | 6:00 | 8:00 | 7:00 | 7:00 |
| 2:00 | 7:00 | 9:00 | 8:00 | 8:00 |
| 3:00 | 8:00 | 10:00 | 9:00 | 9:00 |
| 4:00 | 9:00 | 11:00 | 10:00 | 10:00 |
| 5:00 | 10:00 | 12:00 | 11:00 | 11:00 |
| 6:00 | 11:00 | 13:00 | 12:00 | 12:00 |
| 7:00 | 12:00 | 14:00 | 13:00 | 13:00 |
| 8:00 | 13:00 | 15:00 | 14:00 | 14:00 |
| 9:00 | 14:00 | 16:00 | 15:00 | 15:00 |
| 10:00 | 15:00 | 17:00 | 16:00 | 16:00 |
| 11:00 | 16:00 | 18:00 | 17:00 | 17:00 |
| 12:00 | 17:00 | 19:00 | 18:00 | 18:00 |
| 13:00 | 18:00 | 20:00 | 19:00 | 19:00 |
| 14:00 | 19:00 | 21:00 | 20:00 | 20:00 |
| 15:00 | 20:00 | 22:00 | 21:00 | 21:00 |
| 16:00 | 21:00 | 23:00 | 22:00 | 22:00 |
| 17:00 | 22:00 | 0:00 | 23:00 | 23:00 |
| 18:00 | 23:00 | 1:00 | 0:00 | 0:00 |
| 19:00 | 0:00 | 2:00 | 1:00 | 1:00 |
| 20:00 | 1:00 | 3:00 | 2:00 | 2:00 |
| 21:00 | 2:00 | 4:00 | 3:00 | 3:00 |
| 22:00 | 3:00 | 5:00 | 4:00 | 4:00 |
| 23:00 | 4:00 | 6:00 | 5:00 | 5:00 |
Central Standard Time
Offset: CST is 6 hours behind Greenwich Mean Time (GMT) and is used in North America
Countries: It is used in following countries: Belize, Canada, Costa Rica, Guatemala, Honduras, Mexico, Nicaragua, El Salvador, United States
Principal Cities: The largest city in the CST timezone is Mexico City from Mexico with population about 12.294 million people. Other major cities in the area are Chicago, Houston, Iztapalapa, Ecatepec
French: HNC - Heure Normale du Centre
Spanish: CT - Tiempo Central Estándar, CT - Zona Centro
Daylight Saving: This is a standard time zone, however during summer some places switch clocks for one hour forward when daylight saving comes into effect and observe Central Daylight Time (CDT).
End: Central Standard Time (CST) has ended on Sunday, March 12, 2023 at 2:00 am local time and clocks were set one hour forward to Sunday, March 12, 2023, 3:00 am local daylight time instead. Standard time ends annually the on second Sunday of March.
Start: Central Standard Time (CST) starts on Sunday, November 5, 2023 at 2:00 am local time and clocks are set one hour back to Sunday, November 5, 2023, 1:00 am. Standard time starts annually the on first Sunday of November.
CST representations, usage and related time zones
W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
- -06 - basic short
- -0600 - basic
- -06:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
- -0600 - sign character (-) followed by a four digit time providing hours (06) and minutes (00) of the offset. Indicates six hour and zero minutes time differences to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
- Sierra - Military abbreviation for CST
- S - short form of 'Sierra'
IANA/Olson: Reflects CST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
- America/Bahia_Banderas
- America/Belize
- America/Chicago
- America/Costa_Rica
- America/El_Salvador
- America/Guatemala
- America/Indiana/Knox
- America/Indiana/Tell_City
- America/Knox_IN
- America/Managua
- America/Matamoros
- America/Menominee
- America/Merida
- America/Mexico_City
- America/Monterrey
- America/North_Dakota/Beulah
- America/North_Dakota/Center
- America/North_Dakota/New_Salem
- America/Rainy_River
- America/Rankin_Inlet
- America/Regina
- America/Resolute
- America/Swift_Current
- America/Tegucigalpa
- America/Winnipeg
- CST6CDT
- Canada/Central
- Canada/Saskatchewan
- Mexico/General
- US/Central
- US/Indiana-Starke
CST Abbreviation: Several time zones share CST abbreviation and it could refer to these time zones
- Central Standard Time - UTC -6
- China Standard Time - UTC +8
- Cuba Standard Time - UTC -5
- Colombia Standard Time - UTC -5
Time zones with the GMT -6 offset:
- CST - Central Standard Time
- CT - Central Time
- MDT - Mountain Daylight Time
- EAST - Easter Island Standard Time
- GALT - Galapagos Time
- S - Sierra Time Zone
Greenwich Mean Time
Offset: GMT is 0 hours ahead Greenwich Mean Time (GMT) and is used in Europe
Countries: It is used in following countries: Burkina Faso, Côte d'Ivoire, Britain (UK), Guernsey, Ghana, Greenland, Gambia, Guinea, Guinea-Bissau, Ireland, Isle of Man, Iceland, Jersey, Liberia, Mali, Mauritania, St Helena, Sierra Leone, Senegal, Sao Tome & Principe, Togo
Principal Cities: The largest city in the GMT timezone is London from United Kingdom with population about 7.557 million people. Other major cities in the area are Abidjan, Dakar, Grand Dakar, Accra
Greenwich Mean Time (GMT) originally referred to the mean solar time at the Royal Observatory in Greenwich, London. It is now often used to refer to Coordinated Universal Time (UTC) when this is viewed as a time zone, and in casual use for the most parts it is the same. In military GMT is known as Zulu time.Greenwich Mean Time was the same as Universal Time (UT), until the introduction of UTC in 1972 a standard astronomical concept used in many technical fields.
GMT representations, usage and related time zones
W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
- Z - is the zone designator for the zero UTC/GMT offset, also known as 'Zulu' time
- +00 - basic short
- +0000 - basic
- +00:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
- +0000 - sign character (+) followed by a four digit time providing hours (00) and minutes (00) of the offset. Indicates zero hour and zero minutes time differences of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
- Zulu - Military abbreviation for GMT
- Z - short form of 'Zulu'
IANA/Olson: Reflects GMT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
- Africa/Abidjan
- Africa/Accra
- Africa/Bamako
- Africa/Banjul
- Africa/Bissau
- Africa/Conakry
- Africa/Dakar
- Africa/Freetown
- Africa/Lome
- Africa/Monrovia
- Africa/Nouakchott
- Africa/Ouagadougou
- Africa/Sao_Tome
- Africa/Timbuktu
- America/Danmarkshavn
- Atlantic/Reykjavik
- Atlantic/St_Helena
- Eire
- Etc/GMT
- Etc/GMT+0
- Etc/GMT-0
- Etc/GMT0
- Etc/Greenwich
- Europe/Belfast
- Europe/Dublin
- Europe/Guernsey
- Europe/Isle_of_Man
- Europe/Jersey
- Europe/London
- GB
- GB-Eire
- GMT
- GMT+0
- GMT-0
- GMT0
- Greenwich
- Iceland
GMT Abbreviation: Several time zones share GMT abbreviation and it could refer to these time zones
- Greenwich Mean Time - UTC +0
- GMT+03:00 - UTC +3
- GMT-03:00 - UTC -3
- GMT+07:00 - UTC +7
- GMT+01:00 - UTC +1
- GMT+12:00 - UTC +12
Time zones with the GMT +0 offset:
- EGST - Eastern Greenland Summer Time
- GMT - Greenwich Mean Time
- WET - Western European Time
- AZOST - Azores Summer Time
- UTC - Universal Time Coordinated
- WT - Western Sahara Standard Time
- Z - Zulu Time Zone
Johannesburg Information
Time Zone
Abbreviation / Name
SAST - South Africa Standard Time
UTC / GMT Offset
+2:00 hours during South Africa Standard Time, currently in use.
Johannesburg Facts
Country
South Africa
Alternative Names
EGoli, Giochanesmpournk, IGoli, IJohannesburg, Ioannesburgum, JNB, Jo'anna, Joanesburgo, Joburg, Jog'annesburg, Joganesburg, Jogannesburg, Johanesburgas, Johanesburgo, Johannesarborg, Johannesbourg, Johannesburg, Johannesburga, Johannesburgo, Johannesburgu, Jokhanesburg, Jokhanezburg, Jokhannesburg, J·ohanesbôrg, Jóhannesarborg, Xohanesburgo, Yohannesburg, Yohannesburq, Yohannésburg, Yok-hon-ni-su-pau, Yok-hon-nì-sṳ̂-páu, Yoxannesburg, cohannes beirk, iohanesburgi, johanisabaraga, johannesbarga, johansabarga, jokanasperk, jwhansbrgh, yohaneseubeogeu, yohanesuburugu, yue han nei si bao, yue han ni si bao, ywhnsbwrg, zhwhansbwrg, Γιοχάνεσμπουργκ, Ёганесбург, Јоханезбург, Јоханесбург, Йоганнесбург, Йогьаннесбург, Йоханесбург, Йоханнесбург, Յոհաննեսբուրգ, יאהאנעסבורג, יוהנסבורג, جوهانسبرغ, جوہانسبرگ, جۆھانسبێرگ, ژوهانسبورگ, یوہانس برگ, जोहन्नेस्बर्ग, जोहान्सबर्ग, ਜੋਹਾਨਿਸਬਰਗ, ஜோகானஸ்பேர்க், ജൊഹാനസ്ബർഗ്, โจฮันเนสเบิร์ก, ဂျိုဟန္နက်စဗတ်မြို့, იოჰანესბურგი, ጆሃንስበርግ, ヨハネスブルグ, 約翰尼斯堡, 约翰内斯堡, 요하네스버그
Population
2,026,469
Currency
Rand (ZAR)
Geographic Coordinates
26° 12' S Latitude / 28° 02' E Longitude
International Dialing Code
+27
Dublin Information
Time Zone
Abbreviation / Name
IST - Irish Standard Time
GMT - Greenwich Mean Time
UTC / GMT Offset
+1:00 hour during Irish Standard Time, currently in use.
0:00 hours during Greenwich Mean Time.
Daylight Saving Time Change
+1:00 hour - DST is NOT in use
Daylight Saving Time Starts
Sunday, October 29, 2023 at 2:00 am local time. DST starts annually the on last Sunday of October. Clocks are turned forward 1 hour to Sunday, October 29, 2023, 3:00 am local daylight time instead. Also called Spring Forward or Summer Time.
Daylight Saving Time Ends
Sunday, March 26, 2023 at 1:00 am local time. DST ends annually the on last Sunday of March. Clocks are turned backward 1 hour to Sunday, March 26, 2023, 12:00 am local standard time instead. Also called Fall Back or switch to Winter Time.
Dublin Facts
Country
Ireland
Alternative Names
Baile Atha Cliath, Baile Átha Cliath, Ciuda de Dublin, Ciudá de Dublín, DUB, Dablin, Diblin, Difelin, Divlyn, Doublino, Dublin, Dublin city, Dublina, Dublinas, Dublini, Dublino, Dublinu, Dublín, Dublîn, Dueblin, Dulenn, Dulyn, Dyflinn, Düblin, Eblana, dabalina, dablin, dablina, daburin, dbln, dblyn, deobeullin, dou bai lin, dublini, dwblyn, taplin, Δουβλίνο, Даблин, Дублин, Дублін, Дъблин, Դուբլին, דבלין, דובלין, دبلن, دوبلين, دوبلین, دۇبلىن, ڈبلن, ډبلن, ܕܒܠܢ, डब्लिन, दब्लिन, ডাবলিন, ਡਬਲਿਨ, டப்லின், ಡಬ್ಲಿನ್, ഡബ്ലിൻ, ดับลิน, དུབ་ལིན།, ဒပ်ဗလင်မြို့, დუბლინი, ደብሊን, ダブリン, 都柏林, 더블린
Population
1,024,027
Currency
Euro (EUR)
Geographic Coordinates
53° 19' N Latitude / 6° 14' W Longitude
International Dialing Code
+353
Tunis Information
Time Zone
Abbreviation / Name
CET - Central European Time
UTC / GMT Offset
+1:00 hour during Central European Time, currently in use.
Tunis Facts
Country
Tunisia
Alternative Names
TUN, Tinis, Tiwnis, Tuenis, Tuinis, Tunes, Tunes tamaneɣt, Tunez, Tunis, Tunis khot, Tunis shaary, Tunis-Ville, Tunisa, Tunisas, Tunisi, Tunisin Orn, Tunisz, Tunixi, Tuniz, Tunizo, Tunus, Tynida, Tùnis, Tùnisi, Túinis, Túnez, Túnis, Túnixi, Túniz, Tûnis, Tünis, chunisu, tu ni si, tu ni si shi, tunis, tunis's, tunisa, twiniseu, twns, twnys, twwns, tyunisa, Τύνιδα, Тунис, Тунис хот, Тунис шаары, Тунисин Орн, Туніс, Թունիս, תוניס, تونس, تونس شہر, توونس, تۇنىس شەھىرى, ٹیونس نگر, ܬܘܢܣ, ट्युनिस, ट्यूनिस, ਤੂਨਿਸ, தூனிஸ், ടൂണിസ്സ്, ตูนิส, ཊུ་ནིསི།, ტუნისი, ቱኒስ, チュニス, 突尼斯, 突尼斯市, 튀니스
Population
693,210
Currency
Dinar (TND)
Geographic Coordinates
36° 49' N Latitude / 10° 09' E Longitude
International Dialing Code
+216
EST to IST GMT to EST PST to EST EST to GMT PST to GMT
FAQs
What is the time zone ID database? ›
The tz database is a collaborative compilation of information about the world's time zones, primarily intended for use with computer programs and operating systems. Paul Eggert is its current editor and maintainer, with the organizational backing of ICANN.
What is the name of the TZ database? ›The Time Zone Database (often called tz or zoneinfo) contains code and data that represent the history of local time for many representative locations around the globe. It is updated periodically to reflect changes made by political bodies to time zone boundaries, UTC offsets, and daylight-saving rules.
What is the TZ database name for India? ›IN is the ISO-3166 alpha-2 country code for India. +2232+08822 refers to the latitude and longitude of the reference point, in ISO 6709 format. In this case, it is 22°32'N, 88°22'E, which is in the heart of Kolkata, India. Asia/Kolkata is the IANA TZ identifier for this time zone.
What time zone is India in IANA? ›India uses UTC+5:30, referred to as Asia/Kolkata in the IANA time zone database.