This IST to PST converter helps you convert time between Indian Standard Time and Pacific Standard Time. Perfect for scheduling meetings, calls, and events across time zones.
Compare times across multiple cities worldwide. World time converter and timezone converter for meeting planner, universal time converter, and travel coordination across multiple time zones.
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CURRENT LOCAL TIME
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Tuesday, July 8, 2025
12:00 PM
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Understanding Time Zones: Complete Guide
What are Time Zones?
Time zones are regions of Earth that have adopted the same standard time for legal, commercial, and social purposes. The world is divided into 24 time zones, each typically spanning 15 degrees of longitude, corresponding to one hour of time difference.
Why Do Time Zones Exist?
Before time zones, each city kept its own local time based on the sun's position. This created chaos for railways and telegraph systems. In 1884, the International Meridian Conference established the system we use today, with Greenwich, England as the prime meridian (GMT).
What is UTC?
Coordinated Universal Time (UTC) is the primary time standard by which the world regulates clocks and time. It's essentially the same as GMT but is more scientifically precise. All other time zones are defined as offsets from UTC (e.g., EST is UTC-5, IST is UTC+5:30).
Daylight Saving Time Explained
Daylight Saving Time (DST) is the practice of moving clocks forward by one hour during warmer months to extend evening daylight. Not all countries observe DST, and those that do often change dates differently, making time conversion more complex during transition periods.
Frequently Asked Questions
How do I convert IST to PST?
To convert IST to PST: subtract 13.5 hours during PST (Nov-Mar) or 12.5 hours during PDT (Mar-Nov). For example, 3:00 PM IST = 1:30 AM PST (previous day). Use our free time zone converter above for instant results.
How do I convert EST to GMT?
To convert EST to GMT: add 5 hours during EST (Nov-Mar) or add 4 hours during EDT (Mar-Nov). For example, 2:00 PM EST = 7:00 PM GMT. Our converter automatically handles DST transitions.
How do I convert UTC to IST?
To convert UTC to IST: add 5 hours and 30 minutes. For example, 12:00 PM UTC = 5:30 PM IST. IST is always UTC+5:30 year-round as India doesn't observe Daylight Saving Time.
How do I convert CST to EST?
To convert CST to EST: add 1 hour. For example, 10:00 AM CST = 11:00 AM EST. Both time zones observe Daylight Saving Time simultaneously, so the 1-hour difference remains constant.
How do I convert EST to PST?
To convert EST to PST: subtract 3 hours. For example, 3:00 PM EST = 12:00 PM PST. Both time zones observe Daylight Saving Time simultaneously, so the 3-hour difference remains constant.
What's the difference between EST and EDT?
EST (Eastern Standard Time) is UTC-5 used in winter (Nov-Mar). EDT (Eastern Daylight Time) is UTC-4 used in summer (Mar-Nov). The US switches between them automatically with Daylight Saving Time.
What's the difference between PST and PDT?
PST (Pacific Standard Time) is UTC-8 used in winter. PDT (Pacific Daylight Time) is UTC-7 used in summer. California, Washington, and Oregon switch between PST and PDT with Daylight Saving Time.
Is IST always UTC+5:30?
Yes, Indian Standard Time (IST) is always UTC+5:30. India does not observe Daylight Saving Time, so the offset remains constant year-round, making IST conversions simpler than many other time zones.
What are the best times for international business calls?
For US-India calls: 8-10 AM EST (6:30-8:30 PM IST) or 9-11 PM EST (7:30-9:30 AM IST next day). For US-UK calls: 9 AM-12 PM EST (2-5 PM GMT). Use our world clock to find overlapping business hours.
How do I schedule meetings across multiple time zones?
Use our Advanced Time Planner to compare multiple cities at once. Find overlapping business hours, consider local lunch times (12-1 PM), and avoid very early/late hours. Always confirm time zones with attendees.
What's the best free time zone converter?
timezoneconverter.co offers the most accurate free time zone converter with instant conversions, world clock, multi-city planner, and educational guides. No registration required, works on all devices.
What is the best alternative to WorldTimeBuddy?
timezoneconverter.co is the best with modern design, faster performance, mobile optimization, and comprehensive educational content. All features are free with no registration required.
PST/PDT: Pacific Standard/Daylight Time (UTC-8/-7)
MST/MDT: Mountain Standard/Daylight Time (UTC-7/-6)
CST/CDT: Central Standard/Daylight Time (UTC-6/-5)
EST/EDT: Eastern Standard/Daylight Time (UTC-5/-4)
AST/ADT: Atlantic Standard/Daylight Time (UTC-4/-3)
BRT: Bras?lia Time (UTC-3)
ART: Argentina Time (UTC-3)
Europe & Africa
GMT/BST: Greenwich Mean Time/British Summer Time (UTC+0/+1)
CET/CEST: Central European Time/Summer Time (UTC+1/+2)
EET/EEST: Eastern European Time/Summer Time (UTC+2/+3)
MSK: Moscow Time (UTC+3)
WAT: West Africa Time (UTC+1)
CAT: Central Africa Time (UTC+2)
EAT: East Africa Time (UTC+3)
Asia & Pacific
IST: India Standard Time (UTC+5:30)
CST: China Standard Time (UTC+8)
JST: Japan Standard Time (UTC+9)
KST: Korea Standard Time (UTC+9)
AEST/AEDT: Australian Eastern Standard/Daylight Time (UTC+10/+11)
NZST/NZDT: New Zealand Standard/Daylight Time (UTC+12/+13)
HST: Hawaii Standard Time (UTC-10)
Popular Cities in These Timezones
IST Timezone Cities:
Mumbai, Delhi, Bangalore, Kolkata
PST Timezone Cities:
Los Angeles, San Francisco, Seattle, Portland
Add City
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