How many hours ahead is IST compared to PST?

India Standard Time (IST, UTC+5:30) is 13.5 hours ahead of Pacific Standard Time (PST, UTC−8) in winter. In summer, when California shifts to PDT (UTC−7), the gap narrows to 12.5 hours. India never observes daylight saving time, so any change in the gap is entirely due to California’s clock change.

What is the best meeting window between PST and IST?

The most practical window is evening PST / morning IST. A call at 7–9 PM PST (winter) lands at 8:30–10:30 AM IST the next morning, catching India early in their day while asking California to stay slightly late. In summer (PDT), 7 PM PDT is 7:30 AM IST — an even better India morning slot.

Can PST and IST share any business hours?

Barely. Standard California business hours (9 AM–6 PM PST) correspond to 10:30 PM–7:30 AM IST (next day). Standard India hours (9 AM–6 PM IST) correspond to 7:30 PM–6:30 AM PST (previous day). There is essentially no natural overlap, making this one of the most challenging global scheduling pairs.

PST vs IST: Time Difference and Conversion

March 7, 2026

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Frequently Asked Questions

How many hours ahead is IST compared to PST?: India Standard Time (IST, UTC+5:30) is 13.5 hours ahead of Pacific Standard Time (PST, UTC−8) in winter. In summer, when California shifts to PDT (UTC−7), the gap narrows to 12.5 hours. India never observes daylight saving time, so any change in the gap is entirely due to California’s clock change.
What is the best meeting window between PST and IST?: The most practical window is evening PST / morning IST. A call at 7–9 PM PST (winter) lands at 8:30–10:30 AM IST the next morning, catching India early in their day while asking California to stay slightly late. In summer (PDT), 7 PM PDT is 7:30 AM IST — an even better India morning slot.
Can PST and IST share any business hours?: Barely. Standard California business hours (9 AM–6 PM PST) correspond to 10:30 PM–7:30 AM IST (next day). Standard India hours (9 AM–6 PM IST) correspond to 7:30 PM–6:30 AM PST (previous day). There is essentially no natural overlap, making this one of the most challenging global scheduling pairs.