AST MumbaiTime Converter
AST (UTC−4) is currently 9 hours 30 minutes behind Mumbai (IST, UTC+5:30). Compare live clocks, convert any hour, and find times to meet.
Quick answer
When it's in AST, it's the same day in Mumbai.
AST runs 9 hours 30 minutes behind Mumbai (IST). A 9-to-5 workday on one side lands in the other side's evening or night, so the two cities share almost no normal working hours — edge-of-day calls are the trick.
- Time difference
- +9h 30m
- AST
- UTC−4
- Mumbai
- UTC+5:30
- Best call window
- Outside 9–6
AST to Mumbai conversion table
The next 12 hours in AST and the matching local time in Mumbai. The current hour is highlighted; drag the converter's slider and the table follows.
| AST | Mumbai · IST |
|---|---|
| NOW Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Best time to meet between AST & Mumbai
Working hours are 9am–6pm in each city. The bright band is where they overlap — when both sides are at their desks.
Daylight saving shifts this gap by up to 1 hour
The difference between AST and Mumbai swings between 8.5 and 9.5 hours across the year as each side starts or ends daylight saving. Regions on AST switch to ADT (UTC−3) during daylight saving time. Mumbai does not observe daylight saving time. 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 AST
To Mumbai
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 AST time in Mumbai?", 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 IANA zones and every possible offset
- Live times in <time datetime> elements with explicit UTC offsets
{
"pair": "AST → Mumbai",
"url": "https://worldclock.pro/en/convert/ast-to-mumbai",
"from": {
"name": "AST",
"type": "timezone",
"abbreviation": "AST",
"daylightAbbreviation": "ADT",
"iana": "America/Halifax",
"standardUtcOffset": "-04:00",
"daylightUtcOffset": "-03:00",
"referenceCity": "Halifax"
},
"to": {
"name": "Mumbai",
"type": "city",
"abbreviation": "IST",
"daylightAbbreviation": null,
"iana": "Asia/Kolkata",
"standardUtcOffset": "+05:30",
"daylightUtcOffset": null,
"referenceCity": "Mumbai"
},
"currentDifferenceMinutes": 570,
"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 AST and Mumbai?
AST is currently 9 hours 30 minutes behind Mumbai. AST is on AST (UTC−4) and Mumbai is on IST (UTC+5:30). The difference can change when either side starts or ends daylight saving time.
Is Mumbai ahead of or behind AST?
Mumbai is currently 9 hours 30 minutes ahead of AST.
When it is 9:00 AM in AST, what time is it in Mumbai?
When it is 9:00 AM on a Monday in AST, it is 6:30 PM in Mumbai.
Do AST and Mumbai observe daylight saving time?
Regions on AST switch to ADT (UTC−3) during daylight saving time. Mumbai does not observe daylight saving time.
How do I convert AST time to Mumbai time?
Add 9 hours 30 minutes to any time in AST to get the time in Mumbai. This page's converter and 24-hour table do it automatically and stay correct through daylight-saving changes.
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