IST (India Standard Time) (UTC+5:30) is 13 hours and 30 minutes ahead of literal PST (Pacific Standard Time) (UTC-8), and 12 hours and 30 minutes ahead of PDT (Pacific Daylight Time, UTC-7) during Daylight Saving Time. When it is 9:00 AM PST, it is 10:30 PM IST; when it is 9:00 AM PDT, it is 9:30 PM IST. Best meeting window: 6:00 PM – 9:00 PM PST (7:30 AM – 10:30 AM IST (+1 day)) in standard PST, or 6:30 PM – 9:00 PM PDT (7:00 AM – 9:30 AM IST (+1 day)) in PDT.
Because IST is 13 hours and 30 minutes ahead in PST and 12 hours and 30 minutes ahead in PDT, IST enters the next calendar day (+1 day) at 10:30 AM PST in winter and 11:30 AM PDT in summer in PST. Before that cutoff, both locations share the same weekday; from 10:30 AM PST (11:30 AM PDT in summer) until midnight in PST, Mon–Fri in PST maps to Tue–Sat in IST.
Weekend & Workday Alignment: Friday afternoon/evening in PST (any slot at or after 10:30 AM PST / 11:30 AM PDT in summer) lands on Saturday morning/afternoon in IST—which is IST's weekend (Sat–Sun). Conversely, Monday morning in IST (before 1:30 PM IST) is still Sunday in PST (PST's Sat–Sun weekend). For late-day PST / morning IST syncs, book Monday–Thursday in PST (Tuesday–Friday in IST).
When converting PST to IST, always distinguish between literal PST (Pacific Standard Time, UTC-8) and its Daylight Saving counterpart PDT (Pacific Daylight Time, UTC-7). Under literal PST (UTC-8), IST (UTC+5:30) is 13 hours and 30 minutes ahead of PST. During summer Daylight Saving Time (PDT, UTC-7), IST is 12 hours and 30 minutes ahead of PDT. Unlike single-city converters, this timezone-level reference applies across every metropolitan hub in both zones below.
For PST → IST: Literal PST (Pacific Standard Time) is UTC-8, observed from the first Sunday in November to the second Sunday in March. From mid-March to early November, California, Washington, and British Columbia observe PDT (Pacific Daylight Time, UTC-7).
| Abbreviation Meaning | UTC Offset | IANA Zone | Major Cities & Regions |
|---|---|---|---|
| Pacific Standard Time (North America) Primary Here | UTC-8 (PDT UTC-7 in summer) | America/Los_Angeles | Active on PST → IST: San Francisco, Los Angeles, Seattle, Vancouver |
| Philippine Standard Time (also abbreviated PHT) | UTC+8 (year-round, no DST) | Asia/Manila | Not used for PST → IST: Manila, Cebu, Davao (Philippines) |
| Pakistan Standard Time (abbreviated PKT) | UTC+5 (year-round, no DST) | Asia/Karachi | Not used for PST → IST: Karachi, Lahore, Islamabad (Pakistan — often confused with PST) |
For PST → IST: India Standard Time (IST, UTC+5:30) is a single national half-hour offset observed year-round across all of India (IANA zone Asia/Kolkata) with no Daylight Saving Time. Note: Neighboring Sri Lanka shares the same UTC+5:30 offset year-round under its own IANA timezone (Asia/Colombo, Sri Lanka Standard Time / SLST).
| Abbreviation Meaning | UTC Offset | IANA Zone | Major Cities & Regions |
|---|---|---|---|
| India Standard Time Primary Here | UTC+5:30 (year-round, no DST) | Asia/Kolkata | Active on PST → IST: Mumbai, New Delhi, Bengaluru, Hyderabad, Chennai, Pune (India) |
| Irish Standard Time | UTC+1 (summer only; GMT UTC+0 in winter) | Europe/Dublin | Not used for PST → IST: Dublin, Cork, Galway (Ireland) |
| Israel Standard Time | UTC+2 (IDT UTC+3 in summer) | Asia/Jerusalem | Not used for PST → IST: Tel Aviv, Jerusalem (Israel) |
IST (UTC+5:30) sits on a 30-minute fractional offset from UTC rather than a whole-hour boundary. Every on-the-hour (:00) timestamp in PST converts to a :30 half-hour timestamp in IST.
Example: 9:00 AM PST in PST converts to 10:30 PM IST in IST (13 hours and 30 minutes difference), while 9:00 AM PDT converts to 9:30 PM IST (12 hours and 30 minutes difference).
With a 13 hours and 30 minutes gap in PST (PST → IST) and a 12 hours and 30 minutes gap in PDT (PDT → IST), PST and IST have 0 hours of simultaneous 9:00 AM – 5:00 PM business hours in either season. Meetings use morning and early-evening shoulder windows within 7:00 AM – 9:00 PM local time.
Optimal PST–IST shoulder bridge for PST (UTC-8) (13 hours and 30 minutes gap) and PDT (UTC-7) (12 hours and 30 minutes gap), ending at or before 9:00 PM local time.
Covers every hour where PST or IST is outside 7:00 AM – 9:00 PM local time (20h/day in PST (UTC-8); 20h/day in PDT (UTC-7)).
By strict timezone definition, IST (India Standard Time, UTC+5:30) is 13 hours and 30 minutes ahead of PST (Pacific Standard Time, UTC-8). When North American Pacific Time (PT) switches to Daylight Saving Time (PDT, UTC-7) from March to November, the gap narrows to 12 hours and 30 minutes (IST ahead of PDT).
No Daylight Saving Time observed. Remains on IST (UTC+5:30) year-round.
| Date Window | Duration | Active Zones | Time Difference | Regime |
|---|---|---|---|---|
| Since Nov 1, 2026 | 133 days | PST (UTC-8) → IST (UTC+5:30) | 13 hours and 30 minutes | Standard Alignment (Active Now) |
| Mar 14, 2027 – Nov 4, 2027 | 235 days | PDT (UTC-7) → IST (UTC+5:30) | 12 hours and 30 minutes | Standard Alignment |
| PST Time | IST (Literal PST (UTC-8) → IST (UTC+5:30)) | Day Shift | IST (Daylight PDT (UTC-7) → IST (UTC+5:30)) | Call Status |
|---|---|---|---|---|
| 9:00 AM PST (Morning Start) | 10:30 PM IST | Same day | 9:30 PM IST | Late evening / night |
| 12:00 PM PST (Midday / Noon) | 1:30 AM IST (+1 day) | +1 day | 12:30 AM IST (+1 day) | Overnight / Rest |
| 3:00 PM PST (Afternoon) | 4:30 AM IST (+1 day) | +1 day | 3:30 AM IST (+1 day) | Overnight / Rest |
| 6:00 PM PST (Evening Wrap-up) | 7:30 AM IST (+1 day) | +1 day | 6:30 AM IST (+1 day) | Shoulder Hours |
| PST (PST) | IST (Literal PST (UTC-8) → IST (UTC+5:30)) | Day (IST) | IST (Daylight PDT (UTC-7) → IST (UTC+5:30)) | Availability (PST ↔ IST) |
|---|---|---|---|---|
| 12:00 AM PST in PST | 1:30 PM IST in IST | Same day | 12:30 PM IST | PST–IST Overnight |
| 1:00 AM PST in PST | 2:30 PM IST in IST | Same day | 1:30 PM IST | PST–IST Overnight |
| 2:00 AM PST in PST | 3:30 PM IST in IST | Same day | 2:30 PM IST | PST–IST Overnight |
| 3:00 AM PST in PST | 4:30 PM IST in IST | Same day | 3:30 PM IST | PST–IST Overnight |
| 4:00 AM PST in PST | 5:30 PM IST in IST | Same day | 4:30 PM IST | PST–IST Overnight |
| 5:00 AM PST in PST | 6:30 PM IST in IST | Same day | 5:30 PM IST | PST–IST Overnight |
| 6:00 AM PST in PST | 7:30 PM IST in IST | Same day | 6:30 PM IST | PST–IST Overnight |
| 7:00 AM PST in PST | 8:30 PM IST in IST | Same day | 7:30 PM IST | PST–IST Overnight |
| 8:00 AM PST in PST | 9:30 PM IST in IST | Same day | 8:30 PM IST | PST–IST Late evening / night |
| 9:00 AM PST in PST | 10:30 PM IST in IST | Same day | 9:30 PM IST | PST–IST Late evening / night |
| 10:00 AM PST in PST | 11:30 PM IST in IST | Same day | 10:30 PM IST | PST–IST Late evening / night |
| 11:00 AM PST in PST | 12:30 AM IST in IST | +1 day | 11:30 PM IST | PST–IST Overnight |
| 12:00 PM PST in PST | 1:30 AM IST in IST | +1 day | 12:30 AM IST (+1 day) | PST–IST Overnight |
| 1:00 PM PST in PST | 2:30 AM IST in IST | +1 day | 1:30 AM IST (+1 day) | PST–IST Overnight |
| 2:00 PM PST in PST | 3:30 AM IST in IST | +1 day | 2:30 AM IST (+1 day) | PST–IST Overnight |
| 3:00 PM PST in PST | 4:30 AM IST in IST | +1 day | 3:30 AM IST (+1 day) | PST–IST Overnight |
| 4:00 PM PST in PST | 5:30 AM IST in IST | +1 day | 4:30 AM IST (+1 day) | PST–IST Overnight |
| 5:00 PM PST in PST | 6:30 AM IST in IST | +1 day | 5:30 AM IST (+1 day) | PST–IST Overnight |
| 6:00 PM PST in PST | 7:30 AM IST in IST | +1 day | 6:30 AM IST (+1 day) | PST–IST Shoulder |
| 7:00 PM PST in PST | 8:30 AM IST in IST | +1 day | 7:30 AM IST (+1 day) | PST–IST Shoulder |
| 8:00 PM PST in PST | 9:30 AM IST in IST | +1 day | 8:30 AM IST (+1 day) | PST–IST Shoulder |
| 9:00 PM PST in PST | 10:30 AM IST in IST | +1 day | 9:30 AM IST (+1 day) | PST–IST Late evening / night |
| 10:00 PM PST in PST | 11:30 AM IST in IST | +1 day | 10:30 AM IST (+1 day) | PST–IST Late evening / night |
| 11:00 PM PST in PST | 12:30 PM IST in IST | +1 day | 11:30 AM IST (+1 day) | PST–IST Late evening / night |
Literal IST (UTC+5:30) is 13 hours and 30 minutes ahead of PST (UTC-8). When North American Pacific Time (PT) observes PDT (UTC-7) for Daylight Saving Time, IST is 12 hours and 30 minutes ahead of PDT.
9:00 AM PST (UTC-8) converts to 10:30 PM IST. During Daylight Saving Time, 9:00 AM PDT (UTC-7) converts to 9:30 PM IST.
During winter standard time (PST), book calls between 6:00 PM – 9:00 PM PST (7:30 AM – 10:30 AM IST (+1 day)). During summer daylight time (PDT), shift calls to 6:30 PM – 9:00 PM PDT (7:00 AM – 9:30 AM IST (+1 day)) so the IST side wraps up by 9:00 PM.
On this converter, IST stands for India Standard Time (UTC+5:30, IANA zone Asia/Kolkata). Globally, the abbreviation "IST" can denote: India Standard Time (UTC+5:30 (year-round, no DST), Asia/Kolkata); Irish Standard Time (UTC+1 (summer only; GMT UTC+0 in winter), Europe/Dublin); Israel Standard Time (UTC+2 (IDT UTC+3 in summer), Asia/Jerusalem). Note that Sri Lanka uses the same UTC+5:30 offset as India under its own zone (Asia/Colombo, SLST).
PST/PDT covers San Francisco, Los Angeles, Seattle, Vancouver, San Diego, Portland. IST covers Mumbai, Bengaluru, New Delhi, Hyderabad, Chennai, Pune, Kolkata.