Havana
Cuba
--:-- --
GMT-5 · UTC-5 8 hours 30 minutes difference
Tehran
Iran
--:-- --
GMT+3:30 · UTC+3:30 Convert Havana (GMT-5) to Tehran (GMT+3:30) Time — 8 hours 30 minutes apart
America/Havana · GMT-5 · UTC-5 | Asia/Tehran · GMT+3:30 · UTC+3:30 · 8 hours 30 minutes difference · 215 cities · DST applies
24-Hour Overlap Timeline
✅ Overlap: 9:00 AM–10:00 AM in Havana · 5:00 PM–6:00 PM in Tehran (1h window)
⚠ Havana observes daylight saving time — offset may vary by up to 1 hour seasonally
| 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 → | ||||||||||||||||||||||||
| 🇨🇺 Havana UTC-5 | 7p | 8p | 9p | 10p | 11p | 12a | 1a | 2a | 3a | 4a | 5a | 6a | 7a | 8a | 9a | 10a | 11a | 12p | 1p | 2p | 3p | 4p | 5p | 6p |
| 🇮🇷 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 |
Both working Working Off hours Sleeping Now
Key Facts: Havana (GMT-5) vs Tehran (GMT+3:30)
Time Gap
8h 30m
Tehran ahead
May vary ±1h (DST)
DST Status
⏰ Havana
Observes DST
✅ Tehran: No DST
Cities in GMT-5
52
Largest: Havana
2,089,532 pop.
Overlap Window
1h window
9:00 AM – 10:00 AM (GMT-5)
5:00 PM – 6:00 PM (GMT+3:30)
Find Cities in Havana & Tehran Timezones
The GMT-5 and GMT+3:30 timezones are separated by 8 hours 30 minutes. Havana is the largest city in the America/Havana zone and Tehran is the largest in Asia/Tehran. Havana observes daylight saving time — the difference may change by 1 hour seasonally. For scheduling between these regions, the key fact is: there are only 1 hour of mutual business-hours overlap.
Best Times to Schedule Calls: Havana (GMT-5) ↔ Tehran (GMT+3:30)
| Havana (GMT-5) | Tehran (GMT+3:30) | Quality |
|---|---|---|
| 12:00 AM | 8:00 AM | ❌ |
| 1:00 AM | 9:00 AM | ❌ |
| 2:00 AM | 10:00 AM | ❌ |
| 3:00 AM | 11:00 AM | ❌ |
| 4:00 AM | 12:00 PM | ❌ |
| 5:00 AM | 1:00 PM | ❌ |
| 6:00 AM | 2:00 PM | ❌ |
| 7:00 AM | 3:00 PM | ⚠️ |
| 8:00 AM | 4:00 PM | ⚠️ |
| 9:00 AM | 5:00 PM | ✅ |
| 10:00 AM | 6:00 PM | ⚠️ |
| 11:00 AM | 7:00 PM | ⚠️ |
| 12:00 PM | 8:00 PM | ❌ |
| 1:00 PM | 9:00 PM | ❌ |
| 2:00 PM | 10:00 PM | ❌ |
| 3:00 PM | 11:00 PM | ❌ |
| 4:00 PM | 12:00 AM +1 day | ❌ |
| 5:00 PM | 1:00 AM +1 day | ❌ |
| 6:00 PM | 2:00 AM +1 day | ❌ |
| 7:00 PM | 3:00 AM +1 day | ❌ |
| 8:00 PM | 4:00 AM +1 day | ❌ |
| 9:00 PM | 5:00 AM +1 day | ❌ |
| 10:00 PM | 6:00 AM +1 day | ❌ |
| 11:00 PM | 7:00 AM +1 day | ❌ |
Work hours defined as 09:00–18:00 local time. ✅ Both in work hours ⚠️ Borderline ❌ Outside work hours.
GMT-5 to GMT+3:30: Complete 24-Hour Time Conversion Table
| Havana (GMT-5) | Tehran (GMT+3:30) | IST (UTC+5:30) |
|---|---|---|
| 12:00 AM | 8:30 AM | 10:30 AM |
| 1:00 AM | 9:30 AM | 11:30 AM |
| 2:00 AM | 10:30 AM | 12:30 PM |
| 3:00 AM | 11:30 AM | 1:30 PM |
| 4:00 AM | 12:30 PM | 2:30 PM |
| 5:00 AM | 1:30 PM | 3:30 PM |
| 6:00 AM | 2:30 PM | 4:30 PM |
| 7:00 AM | 3:30 PM | 5:30 PM |
| 8:00 AM | 4:30 PM | 6:30 PM |
| 9:00 AM | 5:30 PM | 7:30 PM |
| 10:00 AM | 6:30 PM | 8:30 PM |
| 11:00 AM | 7:30 PM | 9:30 PM |
| 12:00 PM | 8:30 PM | 10:30 PM |
| 1:00 PM | 9:30 PM | 11:30 PM |
| 2:00 PM | 10:30 PM | 12:30 AM |
| 3:00 PM | 11:30 PM | 1:30 AM |
| ← Date changes in Tehran → | ||
| 4:00 PM | 12:30 AM +1 | 2:30 AM |
| 5:00 PM | 1:30 AM +1 | 3:30 AM |
| 6:00 PM | 2:30 AM +1 | 4:30 AM |
| 7:00 PM | 3:30 AM +1 | 5:30 AM |
| 8:00 PM | 4:30 AM +1 | 6:30 AM |
| 9:00 PM | 5:30 AM +1 | 7:30 AM |
| 10:00 PM | 6:30 AM +1 | 8:30 AM |
| 11:00 PM | 7:30 AM +1 | 9:30 AM |
IST (India Standard Time, UTC+5:30) shown as reference for Indian users. +1/−1 indicates a different calendar day.
52 Cities in Havana (GMT-5) & 163 Cities in Tehran (GMT+3:30)
Havana & 51 more — Havana (GMT-5, UTC-5)
- Havana, CU 2.1M
- Santiago de Cuba, CU 445K
- Holguin, CU 350K
- Camaguey, CU 322K
- Santa Clara, CU 247K
- Bayamo, CU 235K
- Guantanamo, CU 228K
- Carlos Manuel de Cespedes, CU 224K
- Arroyo Naranjo, CU 210K
- Las Tunas, CU 202K
- Pinar del Rio, CU 189K
- Cienfuegos, CU 165K
- San Miguel del Padron, CU 161K
- Matanzas, CU 152K
- Manzanillo, CU 151K
La Lisa, CUCiego de Avila, CUSancti Spiritus, CUMarianao, CUCentro Habana, CUCerro, CUPalma Soriano, CUGuanabacoa, CUContramaestre, CUMayari, CUPuerto Padre, CUSan Luis, CUJaguey Grande, CUConsolacion del Sur, CUCardenas, CUSan Jose de las Lajas, CUBaracoa, CUTrinidad, CUCotorro, CUMoa, CUColon, CUFlorida, CUPlacetas, CUGibara, CUGuines, CUManicaragua, CUYara, CUMoron, CUArtemisa, CUJiguani, CUJovellanos, CUCamajuani, CUBartolome Maso, CUSanta Lucia, CUYaguajay, CUSagua la Grande, CURanchuelo, CU
Tehran & 162 more — Tehran (GMT+3:30, UTC+3:30)
- Tehran, IR 14.1M
- Mashhad, IR 3.7M
- Esfahan, IR 2.2M
- Karaj, IR 2.0M
- Shiraz, IR 1.6M
- Tabriz, IR 1.6M
- Ahvaz, IR 1.3M
- Qom, IR 1.2M
- Kermanshah, IR 947K
- Kerman, IR 738K
- Orumiyeh, IR 736K
- Borvayeh-ye Al Bu `Aziz, IR 690K
- Rasht, IR 680K
- Bahar, IR 673K
- Zahedan, IR 588K
Hamadan, IRYazd, IRArdabil, IRBandar `Abbas, IRArak, IREslamshahr, IRSanandaj, IRQazvin, IRZanjan, IRGorgan, IRShahriar, IRShahr-e Qods, IRKashan, IRMalard, IRMaragheh, IRSarta, IRDezful, IRBabol, IRQa'em Shahr, IRKhomeyni Shahr, IRSabzevar, IRAndimeshk, IRAmol, IRPakdasht, IRNajafabad, IRBorujerd, IRMadan, IRQarchak, IRBojnurd, IRVaramin, IRBandar-e Bushehr, IRNeyshabur, IRSaveh, IRBirjand, IRNasim Shahr, IRKhorramabad, IRKhowy, IRBukan, IRShahr-e Kord, IRSemnan, IRFardis, IRSirjan, IRShahin Shahr, IRMalayer, IRMahabad, IRSaqqez, IRShahrud, IRKhodabandeh, IRBandar-e Mahshahr, IRRafsanjan, IRBorazjan, IRGonbad-e Kavus, IRMarvdasht, IRQuchan, IRJahrom, IRKamalshahr, IRTorbat-e Heydariyeh, IRMarivan, IRShahreza, IRZabol, IRKhorramshahr, IRMarand, IRJiroft, IRSalmas, IRBam, IRBehbahan, IRDorud, IRNazarabad, IRMohammad Shahr, IRBandar-e Anzali, IRIranshahr, IRFasa, IRBaneh, IRYasuj, IRChabahar, IRRobat Karim, IRKashmar, IRShushtar, IRAhar, IRMasjed Soleyman, IRTorbat-e Jam, IRAbhar, IRMianeh, IRDo Gonbadan, IRKazerun, IRBehshahr, IRAlvand, IRPiranshahr, IREslamabad-e Gharb, IRKuhdasht, IRFulad Shahr, IRKhowrasgan, IRTajrish, IRShirvan, IRMeybod, IRTakestan, IRLangarud, IRBumahen, IRBaharestan, IRAligudarz, IRBandar-e Emam Khomeyni, IRBandar Emam, IRQorveh, IRShush, IRNahavand, IRBonab, IRArdakan, IRRamhormoz, IRMeshgin Shahr, IRBandar-e Genaveh, IRNaqadeh, IRKhomeyn, IROmidiyeh, IRAran Bidgol, IRBaqershahr, IRMahdasht, IRMobarakeh, IRMeshkin Dasht, IRNeka, IRKangan, IRAbyek, IRSaravan, IRBabolsar, IREsfarayen, IRDamghan, IRZarand, IRBorujen, IRDehdasht, IRKhash, IRTaybad, IRKut-e `Abdollah, IRZarrin Shahr, IRAsadabad, IRHashtgerd, IRTonekabon, IRKhorramdarreh, IREqbaliyeh, IRJavanrud, IRHashtpar, IRSefrou, MASabbashahr, IRBandar-e Torkaman, IRChenaran, IRBijar, IR`Aliabad-e Katul, IRKahnuj, IRSusangerd, IRTuyserkan, IR
⚠️ Daylight Saving Time Affects This Pair
| Timezone | DST? | Standard | Daylight |
|---|---|---|---|
| America/Havana | Yes | UTC-5 | UTC-4 |
| Asia/Tehran | No | UTC+3:30 | — |
During DST periods the time difference between these zones may be 7 hours 30 minutes instead of 8 hours 30 minutes. Always verify the current offset if scheduling calls near clock-change dates.