What is the time difference between Johannesburg and Tehran?

Tehran is 1 hour 30 minutes ahead of Johannesburg during standard time.

When is the best time to schedule a call between Johannesburg and Tehran?

The best times to connect are 9:00 AM GMT+2, 10:00 AM GMT+2, 11:00 AM GMT+2, when both regions are within standard business hours.

Khartoum to Tehran Time Converter — GMT+2 to GMT+3:30, 1 hour 30 minutes difference

24-Hour Overlap Timeline

✅ Overlap: 9:00 AM–5:00 PM in Khartoum · 10:00 AM–6:00 PM in Tehran (8h window)

	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23
UTC →
🇸🇩 Khartoum UTC+2	2a	3a	4a	5a	6a	7a	8a	9a	10a	11a	12p	1p	2p	3p	4p	5p	6p	7p	8p	9p	10p	11p	12a	1a
🇮🇷 Tehran UTC+3:30	3a	4a	5a	6a	7a	8a	9a	10a	11a	12p	1p	2p	3p	4p	5p	6p	7p	8p	9p	10p	11p	12a	1a	2a
🇮🇳 India (IST) UTC+5:30	5a	6a	7a	8a	9a	10a	11a	12p	1p	2p	3p	4p	5p	6p	7p	8p	9p	10p	11p	12a	1a	2a	3a	4a

Both working Working Off hours Sleeping Now

Key Facts: Khartoum (GMT+2) vs Tehran (GMT+3:30)

Time Gap

1h 30m

Tehran ahead

DST Status

✅ Johannesburg

No DST

✅ Tehran: No DST

Cities in GMT+2

273

Largest: Khartoum

7,869,000 pop.

Overlap Window

8h window

9:00 AM – 5:00 PM (GMT+2)

10:00 AM – 6:00 PM (GMT+3:30)

Find Cities in Johannesburg & Tehran Timezones

The GMT+2 and GMT+3:30 timezones are separated by 1 hour 30 minutes. Khartoum is the largest city in the Africa/Johannesburg zone and Tehran is the largest in Asia/Tehran. Neither timezone observes daylight saving time, so the difference is constant year-round. For scheduling between these regions, the key fact is: there are 8 hours of mutual business-hours overlap each day.

Best Times to Schedule Calls: Khartoum (GMT+2) ↔ Tehran (GMT+3:30)

Johannesburg (GMT+2)	Tehran (GMT+3:30)	Quality
5:00 AM	6:00 AM	❌
6:00 AM	7:00 AM	❌
7:00 AM	8:00 AM	⚠️
8:00 AM	9:00 AM	⚠️
9:00 AM	10:00 AM	✅
10:00 AM	11:00 AM	✅
11:00 AM	12:00 PM	✅
12:00 PM	1:00 PM	✅
1:00 PM	2:00 PM	✅
2:00 PM	3:00 PM	✅
3:00 PM	4:00 PM	✅
4:00 PM	5:00 PM	✅
5:00 PM	6:00 PM	⚠️
6:00 PM	7:00 PM	⚠️
7:00 PM	8:00 PM	❌
8:00 PM	9:00 PM	❌
9:00 PM	10:00 PM	❌

Work hours defined as 09:00–18:00 local time. ✅ Both in work hours ⚠️ Borderline ❌ Outside work hours.

GMT+2 to GMT+3:30: Complete 24-Hour Time Conversion Table

Johannesburg (GMT+2)	Tehran (GMT+3:30)	IST (UTC+5:30)
12:00 AM	1:30 AM	3:30 AM
1:00 AM	2:30 AM	4:30 AM
2:00 AM	3:30 AM	5:30 AM
3:00 AM	4:30 AM	6:30 AM
4:00 AM	5:30 AM	7:30 AM
5:00 AM	6:30 AM	8:30 AM
6:00 AM	7:30 AM	9:30 AM
7:00 AM	8:30 AM	10:30 AM
8:00 AM	9:30 AM	11:30 AM
9:00 AM	10:30 AM	12:30 PM
10:00 AM	11:30 AM	1:30 PM
11:00 AM	12:30 PM	2:30 PM
12:00 PM	1:30 PM	3:30 PM
1:00 PM	2:30 PM	4:30 PM
2:00 PM	3:30 PM	5:30 PM
3:00 PM	4:30 PM	6:30 PM
4:00 PM	5:30 PM	7:30 PM
5:00 PM	6:30 PM	8:30 PM
6:00 PM	7:30 PM	9:30 PM
7:00 PM	8:30 PM	10:30 PM
8:00 PM	9:30 PM	11:30 PM
9:00 PM	10:30 PM	12:30 AM
10:00 PM	11:30 PM	1:30 AM
← Date changes in Tehran →
11:00 PM	12:30 AM +1	2:30 AM

IST (India Standard Time, UTC+5:30) shown as reference for Indian users. +1/−1 indicates a different calendar day.

273 Cities in Johannesburg (GMT+2) & 163 Cities in Tehran (GMT+3:30) — Page 1 of 2

Khartoum & 272 more — Johannesburg (GMT+2, UTC+2)

Bukavu, CD Kisangani, CD Matola, MZ Tshikapa, CD Lilongwe, MW Gqeberha, ZA Khartoum North, SD Bunia, CD Pietermaritzburg, ZA Durban, ZA Blantyre, MW Nampula, MZ Uvira, CD Bulawayo, ZW Kitwe, ZM Benghazi, LY Ndola, ZM Port Sudan, SD Kabinda, CD Rustenburg, ZA El Geneina, SD Kassala, SD Beira, MZ Newcastle, ZA El Fasher, SD Likasi, CD Nyala, SD Kaliningrad, RU Kolwezi, CD Katlehong, ZA Juba, SS Zebediela, ZA Windhoek, NA El Obeid, SD Ajdabiya, LY Khayelitsha, ZA Chitungwiza, ZW Gedaref, SD Antonio Enes, MZ Wad Medani, SD Kusti, SD Maseru, LS Randburg, ZA Chipata, ZM Roodepoort, ZA Muhanga, RW Bor, SS Mitchells Plain, ZA Paarl, ZA Mahikeng, ZA Kabwe, ZM East London, ZA Ed Daein, SD Boksburg, ZA Misratah, LY Singa, SD Chingola, ZM Bloemfontein, ZA Germiston, ZA Al Bayda', LY Kurmuk, SD Goma, CD Chimoio, MZ Centurion, ZA Gaborone, BW Beni, CD Mutare, ZW Sandton, ZA Kafue, ZM Ar Ruseris, SD Cidade de Nacala, MZ Al Khums, LY Az Zawiyah, LY Kajo Kaji, SS Mwene-Ditu, CD Malema, MZ Quelimane, MZ Gharyan, LY Klerksdorp, ZA Ed Damazin, SD Yei, SS Isiro, CD Bethelsdorp, ZA Mongu, ZM Kindu, CD Kempton Park, ZA Nqutu, ZA Magwe, SS Al Marj, LY Kroonstad, ZA Wau, SS Benoni, ZA Gweru, ZW George, ZA Kamina, CD Luanshya, ZM Butembo, CD Tete, MZ Al Manaqil, SD Mufulira, ZM Mzuzu, MW Kashikishi, ZM Maridi, SS Nchelenge, ZM Malakal, SS Kalemie, CD Wamba, CD Gandajika, CD Vila Junqueiro, MZ Pinetown, ZA Sannar, SD Lichinga, MZ Pemba, MZ Krugersdorp, ZA Atbara, SD Cacula, AO Tobruk, LY Gitega, BI Ruhengeri, RW Livingstone, ZM Kipushi, CD Polokwane, ZA Mansa, ZM Worcester, ZA Ed Damer, SD Springs, ZA Alberton, ZA Winterveld, ZA Baraka, CD Kwekwe, ZW Parow, ZA Rundu, NA Bwana Mkubwa, ZM Xai-Xai, MZ Kadoma, ZW Sabha, LY Ben Guerir, MA Nkayi, ZW Kasempa, ZM Manzini, SZ Empangeni, ZA Maxixe, MZ Witbank, ZA An Nuhud, SD Ilebo, CD Kongolo, CD Uitenhage, ZA Francistown, BW Walvisbaai, NA Sabratah, LY Al Jumayl, LY Kasama, ZM KwaDukuza, ZA Zomba, MW Mporokoso, ZM Leer, SS Mossel Bay, ZA Vereeniging, ZA Kimberley, ZA Mthatha, ZA Vanderbijlpark, ZA Ruwa, ZW Kadugli, SD Grahamstown, ZA Solwezi, ZM Chinhoyi, ZW Chililabombwe, ZM Masvingo, ZW Darnah, LY Hoopstad, ZA Janzur, LY Gitarama, RW Midrand, ZA Middelburg, ZA Ad Diwem, SD Norton, ZW Luvungi, CD Chirundu, ZM Tshilenge, CD Standerton, ZA Ermelo, ZA Randfontein, ZA Zuwarah, LY Masallatah, LY Cuamba, MZ

Tehran & 162 more — Tehran (GMT+3:30, UTC+3:30)

Hamadan, IR Yazd, IR Ardabil, IR Bandar `Abbas, IR Arak, IR Eslamshahr, IR Sanandaj, IR Qazvin, IR Zanjan, IR Gorgan, IR Shahriar, IR Shahr-e Qods, IR Kashan, IR Malard, IR Maragheh, IR Sarta, IR Dezful, IR Babol, IR Qa'em Shahr, IR Khomeyni Shahr, IR Sabzevar, IR Andimeshk, IR Amol, IR Pakdasht, IR Najafabad, IR Borujerd, IR Madan, IR Qarchak, IR Bojnurd, IR Varamin, IR Bandar-e Bushehr, IR Neyshabur, IR Saveh, IR Birjand, IR Nasim Shahr, IR Khorramabad, IR Khowy, IR Bukan, IR Shahr-e Kord, IR Semnan, IR Fardis, IR Sirjan, IR Shahin Shahr, IR Malayer, IR Mahabad, IR Saqqez, IR Shahrud, IR Khodabandeh, IR Bandar-e Mahshahr, IR Rafsanjan, IR Borazjan, IR Gonbad-e Kavus, IR Marvdasht, IR Quchan, IR Jahrom, IR Kamalshahr, IR Torbat-e Heydariyeh, IR Marivan, IR Shahreza, IR Zabol, IR Khorramshahr, IR Marand, IR Jiroft, IR Salmas, IR Bam, IR Behbahan, IR Dorud, IR Nazarabad, IR Mohammad Shahr, IR Bandar-e Anzali, IR Iranshahr, IR Fasa, IR Baneh, IR Yasuj, IR Chabahar, IR Robat Karim, IR Kashmar, IR Shushtar, IR Ahar, IR Masjed Soleyman, IR Torbat-e Jam, IR Abhar, IR Mianeh, IR Do Gonbadan, IR Kazerun, IR Behshahr, IR Alvand, IR Piranshahr, IR Eslamabad-e Gharb, IR Kuhdasht, IR Fulad Shahr, IR Khowrasgan, IR Tajrish, IR Shirvan, IR Meybod, IR Takestan, IR Langarud, IR Bumahen, IR Baharestan, IR Aligudarz, IR Bandar-e Emam Khomeyni, IR Bandar Emam, IR Qorveh, IR Shush, IR Nahavand, IR Bonab, IR Ardakan, IR Ramhormoz, IR Meshgin Shahr, IR Bandar-e Genaveh, IR Naqadeh, IR Khomeyn, IR Omidiyeh, IR Aran Bidgol, IR Baqershahr, IR Mahdasht, IR Mobarakeh, IR Meshkin Dasht, IR Neka, IR Kangan, IR Abyek, IR Saravan, IR Babolsar, IR Esfarayen, IR Damghan, IR Zarand, IR Borujen, IR Dehdasht, IR Khash, IR Taybad, IR Kut-e `Abdollah, IR Zarrin Shahr, IR Asadabad, IR Hashtgerd, IR Tonekabon, IR Khorramdarreh, IR Eqbaliyeh, IR Javanrud, IR Hashtpar, IR Sefrou, MA Sabbashahr, IR Bandar-e Torkaman, IR Chenaran, IR Bijar, IR `Aliabad-e Katul, IR Kahnuj, IR Susangerd, IR Tuyserkan, IR

Convert Khartoum (GMT+2) to Tehran (GMT+3:30) Time — 1 hour 30 minutes apart