ADT ISTTime Converter
ADT (UTC−3) is currently 8 hours 30 minutes behind IST (UTC+5:30). Compare live clocks, convert any hour, and find times to meet.
Best time to meet between ADT and IST
Best meeting times:
ADT: 9:00 AM – 10:00 AM
IST: 5:30 PM – 6:30 PM
Quick answer
When it's in ADT, it's the same day in IST.
ADT runs 8 hours 30 minutes behind IST. Both sides keep standard office hours with a real 9–6 overlap: the highlighted window above works for everyone.
- Time difference
- +8h 30m
- ADT
- UTC−3
- IST
- UTC+5:30
- Best call window
- 9:00 AM ADT
ADT to IST conversion table
The next 12 hours in ADT and the matching local time in IST. The current hour is highlighted; drag the converter's slider and the table follows.
| ADT | IST |
|---|---|
| NOW Thu, Aug 6 |
Fri, Aug 7 |
Thu, Aug 6 |
Fri, Aug 7 |
Thu, Aug 6 |
Fri, Aug 7 |
Thu, Aug 6 |
Fri, Aug 7 |
Thu, Aug 6 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Daylight saving shifts this gap by up to 1 hour
The difference between ADT and IST swings between 8.5 and 9.5 hours across the year as each side starts or ends daylight saving. ADT is the daylight-saving counterpart of AST (UTC−4). This page always shows the live, DST-aware difference.
Related time zone conversions
Jump straight to another pair: every combination is a live tool, not an article.
From ADT
To IST
One source of truth, for you and your AI
This page exposes the same answer as structured data, so when you ask an assistant "what's 9am ADT time in IST?", it can cite the exact, DST-aware result, not a stale blog post.
- Schema.org JSON-LD on every converter page
- A machine-readable facts island with time zone identifiers and every possible offset
- Live times in <time datetime> elements with explicit UTC offsets
{
"pair": "ADT → IST",
"url": "https://worldclock.pro/en/convert/adt-to-ist",
"from": {
"name": "ADT",
"type": "timezone",
"abbreviation": "AST",
"daylightAbbreviation": "ADT",
"iana": "America/Halifax",
"standardUtcOffset": "-04:00",
"daylightUtcOffset": "-03:00",
"referenceCity": "Halifax"
},
"to": {
"name": "IST",
"type": "timezone",
"abbreviation": "IST",
"daylightAbbreviation": null,
"iana": "Asia/Kolkata",
"standardUtcOffset": "+05:30",
"daylightUtcOffset": null,
"referenceCity": "Mumbai"
},
"currentDifferenceMinutes": 510,
"possibleDifferencesMinutes": [
510,
570
],
"note": "Between the regions that use these zones the difference is 8.5 and 9.5 hours across the year, depending on daylight saving on each side. The clocks on this page show the named zones themselves, which are fixed."
}
Frequently asked questions
What is the time difference between ADT and IST?
ADT is currently 8 hours 30 minutes behind IST. ADT is on ADT (UTC−3) and IST is on IST (UTC+5:30). The difference can change when either side starts or ends daylight saving time.
Is IST ahead of or behind ADT?
IST is currently 8 hours 30 minutes ahead of ADT.
When it is 9:00 AM in ADT, what time is it in IST?
When it is 9:00 AM on a Thursday in ADT, it is 5:30 PM in IST.
Do ADT and IST observe daylight saving time?
ADT is the daylight-saving counterpart of AST (UTC−4). IST does not observe daylight saving time.
How do I convert ADT time to IST time?
Add 8 hours 30 minutes to any time in ADT to get the time in IST. This page's converter and 24-hour table do it automatically and stay correct through daylight-saving changes.
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