Kolkata zone
GMT+5:30 (GMT+5:30)
Denver zone
MDT (GMT-6)
Difference
11h 30m behind Kolkata
Business overlap
No 9-5 overlap
Working hours overlap
Each cell is one hour in Kolkata. Filled cells mark when 9 AM – 5 PM in Kolkata and Denver both apply.
0 hours per day
- Kolkata
- GMT+5:30
- Denver
- GMT-6
- Difference
- -11h 30m
- Business overlap
- 0h
Hour-by-hour conversion
Each row shows the matching local time in Denver for an hour in Kolkata.
| Kolkata | Denver | Day | Window |
|---|---|---|---|
| 12:00 AM | 12:30 PM | previous day | — |
| 1:00 AM | 1:30 PM | previous day | — |
| 2:00 AM | 2:30 PM | previous day | — |
| 3:00 AM | 3:30 PM | previous day | — |
| 4:00 AM | 4:30 PM | previous day | — |
| 5:00 AM | 5:30 PM | previous day | — |
| 6:00 AM | 6:30 PM | previous day | — |
| 7:00 AM | 7:30 PM | previous day | — |
| 8:00 AM | 8:30 PM | previous day | — |
| 9:00 AM | 9:30 PM | previous day | — |
| 10:00 AM | 10:30 PM | previous day | — |
| 11:00 AM | 11:30 PM | previous day | — |
| 12:00 PM | 12:30 AM | same day | — |
| 1:00 PM | 1:30 AM | same day | — |
| 2:00 PM | 2:30 AM | same day | — |
| 3:00 PM | 3:30 AM | same day | — |
| 4:00 PM | 4:30 AM | same day | — |
| 5:00 PM | 5:30 AM | same day | — |
| 6:00 PM | 6:30 AM | same day | — |
| 7:00 PM | 7:30 AM | same day | — |
| 8:00 PM | 8:30 AM | same day | — |
| 9:00 PM | 9:30 AM | same day | — |
| 10:00 PM | 10:30 AM | same day | — |
| 11:00 PM | 11:30 AM | same day | — |
Best meeting windows
Standard 9 AM – 5 PM hours in Kolkata and Denver do not overlap. Plan calls for early Kolkata morning or late Kolkata evening, and rotate the burden between sides.
Tighter overlap is achievable by having the side with later working hours start earlier, or by treating the first and last hours of each side as flexible. The bar above marks every hour where both cities sit inside a 9 AM – 5 PM window.
About converting Kolkata time to Denver time
Kolkata follows the Asia/Kolkata time zone (currently GMT+5:30, GMT+5:30), while Denver follows America/Denver (currently MDT, GMT-6). Denver is 11h 30m behind Kolkata right now.
Denver observes daylight saving time, while Kolkata does not. The offset between the two cities changes by one hour at the daylight saving transitions.
Daylight saving transitions in 2026
Kolkata
Does not observe daylight saving time.
Denver
- Spring forward · Sunday, March 8, 2026
- Fall back · Sunday, November 1, 2026
Reverse this conversion
Denver to Kolkata
Open the converter
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Frequently asked questions
- How many hours is Kolkata from Denver?
- Denver is 11h 30m behind Kolkata right now.
- What time is 9:00 AM Kolkata in Denver?
- 9:00 AM in Kolkata is 9:30 PM (previous day) in Denver.
- What time is 5:00 PM Kolkata in Denver?
- 5:00 PM in Kolkata is 5:30 AM in Denver.
- When do Kolkata and Denver business hours overlap?
- Standard 9 AM - 5 PM working hours in Kolkata and Denver do not overlap. You will need an early or late call.
- Does daylight saving time change the difference between Kolkata and Denver?
- Denver observes daylight saving time while Kolkata does not, so the offset between them changes by one hour twice a year.
Local time page
Time in Kolkata
Local time page
Time in Denver