Convert India Standard Time to Indochina Time
Instantly convert India Standard Time (IST) to Indochina Time (ICT) with our free online calculator.
India Standard Time
10:50:51 AM
Wed, Jun 24 (IST)
Indochina Time
12:20:51 PM
Wed, Jun 24 (ICT)
Convert a Specific Time
24-Hour Comparison
| IST | ICT |
|---|---|
| 12:00 AM | 1.5:00 AM |
| 1:00 AM | 2.5:00 AM |
| 2:00 AM | 3.5:00 AM |
| 3:00 AM | 4.5:00 AM |
| 4:00 AM | 5.5:00 AM |
| 5:00 AM | 6.5:00 AM |
| 6:00 AM | 7.5:00 AM |
| 7:00 AM | 8.5:00 AM |
| 8:00 AM | 9.5:00 AM |
| 9:00 AM | 10.5:00 AM |
| 10:00 AM | 11.5:00 AM |
| 11:00 AM | 0.5:00 PM |
| 12:00 PM | 1.5:00 PM |
| 1:00 PM | 2.5:00 PM |
| 2:00 PM | 3.5:00 PM |
| 3:00 PM | 4.5:00 PM |
| 4:00 PM | 5.5:00 PM |
| 5:00 PM | 6.5:00 PM |
| 6:00 PM | 7.5:00 PM |
| 7:00 PM | 8.5:00 PM |
| 8:00 PM | 9.5:00 PM |
| 9:00 PM | 10.5:00 PM |
| 10:00 PM | 11.5:00 PM |
| 11:00 PM | 0.5:00 AM(+1d) |
How to Convert India Standard Time to Indochina Time
Formula
To convert India Standard Time (IST) to Indochina Time (ICT): Convert IST to ICT
About India Standard Time (IST)
India Standard Time (IST, IANA: Asia/Kolkata) is the civil time of the Republic of India and Sri Lanka, set at UTC+5:30 — one of the world's most populous 30-minute-offset time zones. India does not observe Daylight Saving Time per the Government of India directive (a brief DST trial in 1942-1945 during WWII was discontinued; subsequent proposals from 2010-2017 were rejected by the Indian Government citing minimal energy savings + agricultural sector disruption). IST is defined as the local mean solar time at 82.5°E longitude (passing through Shankargarh fort in Uttar Pradesh, with the reference clock at the National Physical Laboratory in New Delhi per the Indian Institute of Astrophysics). The 30-minute offset is preserved because India's east-west extent (68°E to 97°E) spans ~28° of longitude — approximately 2 hours of solar time — and the central meridian is most representative for a single unified zone. IST serves approximately 1.4 billion people in India + 22 million in Sri Lanka (Sri Lanka observes SLST = UTC+5:30, identical to IST). Major cities: Mumbai (12.5M), Delhi (16.8M, NCR 29M), Bengaluru (8.4M), Hyderabad (10M), Chennai (7M), Kolkata (4.5M), Ahmedabad (5.5M), Pune (3.1M). Affects: BSE/NSE stock exchanges, IPL Indian Premier League cricket schedules.
About Indochina Time (ICT)
Indochina Time (ICT, IANA: Asia/Bangkok, Asia/Ho_Chi_Minh) is the civil time of mainland Southeast Asia (excluding Myanmar + Indonesia), set at UTC+7:00 year-round (no DST). ICT serves approximately 250 million people across: Thailand, Vietnam, Cambodia, Laos, Christmas Island (Australian territory in Indian Ocean), Java + Sumatra + western Indonesia (which uses Western Indonesian Time WIB = identical UTC+7 offset). ICT shares its offset with Krasnoyarsk Time (Russia, UTC+7) and Davis Antarctica research station. Major ICT cities: Bangkok Thailand (10.7M metro — Southeast Asia's largest tourist destination + ASEAN economic hub), Ho Chi Minh City Vietnam (10M city, 14M metro — formerly Saigon, Vietnam's largest city), Hanoi Vietnam (8M metro — capital), Jakarta Indonesia (10.5M city, 35M metro — uses WIB which is identical to ICT but a different zone-name), Phnom Penh Cambodia (2M), Vientiane Laos (820K). Affects: SET (Stock Exchange of Thailand) trading hours, HOSE + HNX (Vietnam stock exchanges) trading, Phnom Penh Securities Exchange (CSX) hours, Bangkok BTS Skytrain + MRT subway operating hours, and ASEAN diplomatic-meeting schedules.