Convert India Standard Time to Mountain Standard Time
Instantly convert India Standard Time (IST) to Mountain Standard Time (MST) with our free online calculator.
India Standard Time
10:50:50 AM
Wed, Jun 24 (IST)
Mountain Standard Time
10:20:50 PM
Tue, Jun 23 (MST)
Convert a Specific Time
24-Hour Comparison
| IST | MST |
|---|---|
| 12:00 AM | 11.5:00 AM(-1d) |
| 1:00 AM | 0.5:00 PM(-1d) |
| 2:00 AM | 1.5:00 PM(-1d) |
| 3:00 AM | 2.5:00 PM(-1d) |
| 4:00 AM | 3.5:00 PM(-1d) |
| 5:00 AM | 4.5:00 PM(-1d) |
| 6:00 AM | 5.5:00 PM(-1d) |
| 7:00 AM | 6.5:00 PM(-1d) |
| 8:00 AM | 7.5:00 PM(-1d) |
| 9:00 AM | 8.5:00 PM(-1d) |
| 10:00 AM | 9.5:00 PM(-1d) |
| 11:00 AM | 10.5:00 PM(-1d) |
| 12:00 PM | 11.5:00 PM(-1d) |
| 1:00 PM | 0.5:00 AM |
| 2:00 PM | 1.5:00 AM |
| 3:00 PM | 2.5:00 AM |
| 4:00 PM | 3.5:00 AM |
| 5:00 PM | 4.5:00 AM |
| 6:00 PM | 5.5:00 AM |
| 7:00 PM | 6.5:00 AM |
| 8:00 PM | 7.5:00 AM |
| 9:00 PM | 8.5:00 AM |
| 10:00 PM | 9.5:00 AM |
| 11:00 PM | 10.5:00 AM |
How to Convert India Standard Time to Mountain Standard Time
Formula
To convert India Standard Time (IST) to Mountain Standard Time (MST): Convert IST to MST
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 Mountain Standard Time (MST)
Mountain Standard Time (MST, IANA: America/Denver and America/Phoenix) is the time zone for the US Mountain region and most of Canada's Rocky Mountain provinces, set at UTC-7:00. MST is observed from the first Sunday in November to the second Sunday in March; the region switches to Mountain Daylight Time (MDT = UTC-6:00) for the remainder of the year — EXCEPT for the State of Arizona (excluding Navajo Nation), which stays on MST year-round per Arizona Revised Statutes §1-242. Major MST cities: Denver, Phoenix, Salt Lake City, Albuquerque, El Paso, Tucson, Calgary, Edmonton. MST covers Colorado, Utah, Wyoming, Montana, Idaho (most), New Mexico, Arizona, parts of Texas + Mexico (Sonora). Population ~17 million in the time zone. Affects: NORAD Cheyenne Mountain operations, Denver Mile-High Stadium NFL game scheduling, Colorado ski-resort lift-operating hours, US Bureau of Land Management permit operations, and the Mormon Tabernacle Choir broadcast schedule from Salt Lake City.