How do I convert EST to PST?

Eastern Standard Time (EST) is UTC-5 and Pacific Standard Time (PST) is UTC-8, so PST is 3 hours behind EST. To convert, subtract 3 hours from EST. For example, 3:00 PM EST = 12:00 PM PST. During daylight saving, EDT (UTC-4) and PDT (UTC-7) maintain the same 3-hour difference.

What is the time difference between EST and IST?

India Standard Time (IST, UTC+5:30) is 10 hours and 30 minutes ahead of Eastern Standard Time (EST, UTC-5). During US daylight saving time, EDT (UTC-4) reduces the gap to 9 hours and 30 minutes. India does not observe DST, so only the US side shifts.

Does this converter handle Daylight Saving Time?

Yes. The converter uses IANA timezone identifiers and the Intl API to automatically account for DST rules at the selected date. The results show whether DST is active in each timezone, and the UTC offsets reflect the actual offset on that date.

What is UTC and how is it different from GMT?

Coordinated Universal Time (UTC) is the global time standard used to regulate clocks worldwide. Greenwich Mean Time (GMT) is a timezone historically tied to the Royal Observatory in Greenwich, London. In practice, UTC and GMT show the same time, but UTC is defined by atomic clocks while GMT is an astronomical time standard. UTC is preferred in technical and international contexts.

How do I find my current timezone?

This converter automatically detects your timezone based on your browser settings. You can also check your device's clock settings — on Windows go to Settings > Time & Language, on Mac go to System Preferences > Date & Time, and on phones check Settings > General > Date & Time.

What is the International Date Line?

The International Date Line (IDL) is an imaginary line roughly following 180 degrees longitude in the Pacific Ocean. When you cross it going west, you advance one calendar day; going east, you go back one day. This is why converting between timezones far apart (e.g., Los Angeles to Tokyo) may show the result on the next or previous day.

How many time zones are there in the world?

There are 38 distinct UTC offsets in use worldwide, not just 24. This is because many regions use half-hour (UTC+5:30 for India, UTC+3:30 for Iran) or quarter-hour offsets (UTC+5:45 for Nepal, UTC+12:45 for Chatham Islands). The IANA timezone database tracks over 400 timezone identifiers to handle historical and political differences.

What countries have half-hour time zones?

Several countries use half-hour UTC offsets: India (UTC+5:30), Iran (UTC+3:30), Afghanistan (UTC+4:30), Myanmar (UTC+6:30), parts of Australia (UTC+9:30 for South Australia and Northern Territory), Sri Lanka (UTC+5:30), and Newfoundland in Canada (UTC-3:30). Nepal uses a quarter-hour offset at UTC+5:45.

How do I schedule a meeting across time zones?

Use the Working Hours Overlap feature above to find when both parties have normal business hours (9 AM - 6 PM). If there is no overlap, consider alternating early/late meeting times. Always include the timezone abbreviation (e.g., '3 PM EST') when sending invitations, and use calendar apps that auto-convert to the recipient's timezone.

What is the difference between EST and EDT?

EST (Eastern Standard Time, UTC-5) is used during winter months (November to March), while EDT (Eastern Daylight Time, UTC-4) is used during summer months (March to November) when clocks move forward one hour. The same pattern applies to all US time zones: CST/CDT, MST/MDT, and PST/PDT.

Time Zone Converter

Convert

Time

Date

IST Time

6:30 PM IST

Saturday, May 9, 2026

Same day

24-Hour Chart

Every hour in EDT converted to IST

EDTIST

12:00 AM→9:30 AM

1:00 AM→10:30 AM

2:00 AM→11:30 AM

3:00 AM→12:30 PM

4:00 AM→1:30 PM

5:00 AM→2:30 PM

6:00 AM→3:30 PM

7:00 AM→4:30 PM

8:00 AM→5:30 PM

9:00 AM→6:30 PM

10:00 AM→7:30 PM

11:00 AM→8:30 PM

12:00 PM→9:30 PM

1:00 PM→10:30 PM

2:00 PM→11:30 PM

3:00 PM→12:30 AM+1

4:00 PM→1:30 AM+1

5:00 PM→2:30 AM+1

6:00 PM→3:30 AM+1

7:00 PM→4:30 AM+1

8:00 PM→5:30 AM+1

9:00 PM→6:30 AM+1

10:00 PM→7:30 AM+1

11:00 PM→8:30 AM+1

Business hours Current

Conversion Details

UTC offsets and DST status for both zones

From (EDT)

9:00 AM EDT — UTC-04:00

To (IST)

6:30 PM IST — UTC+05:30

Time Difference

+9h 30m

DST Status

EDT: DST active · IST: Standard

Working Hours Overlap

Best time to schedule meetings (9 AM – 6 PM)

No overlapping business hours between these time zones. Consider asynchronous communication or early/late meetings.

Quick Reference

Common zones when it's 9:00 AM EDT in EDT

Zone	Time	Code	Day
Los Angeles (Pacific)	6:00 AM PDT	PDT	—
London (GMT/BST)	2:00 PM GMT+1	GMT+1	—
Paris (Central European)	3:00 PM CEST	CEST	—
Tokyo (Japan)	10:00 PM JST	JST	—
Sydney (AEST/AEDT)	11:00 PM AEST	AEST	—
Dubai (Gulf)	5:00 PM GST	GST	—

How Time Zones Work

The basics of UTC offsets, IANA identifiers, and why time zones exist.

The Earth is divided into 24 primary time zones, each roughly 15 degrees of longitude wide. Time zones are measured as offsets from Coordinated Universal Time (UTC), ranging from UTC-12:00 to UTC+14:00. However, many regions use non-standard offsets — India uses UTC+5:30, Nepal uses UTC+5:45, and the Chatham Islands use UTC+12:45.

Each timezone is identified by an IANA timezone name (like "America/New_York" or "Asia/Kolkata") that accounts for historical changes, daylight saving rules, and political boundaries. This converter uses IANA identifiers to ensure accurate conversions at any date.

UTC offsets

Active worldwide

400+

IANA zones

In the timezone database

primary zones

15° longitude each

Understanding Daylight Saving Time (DST)

How daylight saving shifts clocks and which countries observe it.

Daylight Saving Time shifts clocks forward by one hour during warmer months to extend evening daylight. The time difference between two locations can change by 1–2 hours depending on the time of year.

US DST

Clocks spring forward on the second Sunday of March and fall back on the first Sunday of November.

Europe DST

Clocks shift on the last Sundays of March and October. UK uses GMT/BST, continent uses CET/CEST.

No DST regions

India, China, Japan, most of Africa and South America, Arizona (US), and Hawaii stay on standard time year-round.

Common Time Zone Abbreviations

Quick reference for the most-used timezone codes worldwide.

Code	Name	UTC Offset
EST / EDT	Eastern (US)	-5 / -4
CST / CDT	Central (US)	-6 / -5
MST / MDT	Mountain (US)	-7 / -6
PST / PDT	Pacific (US)	-8 / -7
GMT / BST	Greenwich / British	+0 / +1
CET / CEST	Central European	+1 / +2
IST	India Standard	+5:30
JST	Japan Standard	+9
AEST / AEDT	Australian Eastern	+10 / +11
NZST / NZDT	New Zealand	+12 / +13

Scheduling Across Time Zones

Tips for finding meeting times that work across the globe.

Find overlapping hours

Look for when both parties have normal business hours (9 AM – 6 PM). The Working Hours Overlap card above calculates this automatically.

Rotate meeting times

For teams spanning 10+ hours (e.g., US West Coast and India), alternate early/late calls so no one always bears the burden.

Always specify the timezone

Use formats like "3:00 PM EST" or "15:00 UTC" to avoid confusion. Calendar apps auto-convert when timezone is included.

Watch for date line shifts

Converting between far-apart zones (e.g., LA to Tokyo) may land on a different calendar date — always check the day badge.

Frequently Asked Questions

Common questions and detailed answers

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Last updated Mar 25, 2026