How do I convert time between timezones?

To convert between timezones, adjust for the UTC offset difference. For example, 3:00 PM EST (UTC-5) = 8:00 PM GMT (UTC+0) because EST is 5 hours behind UTC. Add 5 hours: 3 PM + 5 = 8 PM. Always account for daylight saving time changes.

What is UTC and why is it used?

UTC (Coordinated Universal Time) is the primary time standard used worldwide, based at the 0° meridian (Greenwich). It does not observe daylight saving time. All other timezones are expressed as offsets from UTC (e.g., EST is UTC-5, JST is UTC+9). UTC is used in computing, aviation, and scientific applications for consistency.

What is daylight saving time (DST)?

Daylight saving time shifts clocks forward by 1 hour in spring and back in fall to extend evening daylight. Not all regions observe DST. EST becomes EDT (UTC-4) during DST, PST becomes PDT (UTC-7). Timezone converters automatically handle DST transitions based on current dates.

How do I schedule a meeting across timezones?

Use a timezone converter to find overlapping business hours. For example, 2:00 PM EST = 11:00 AM PST = 7:00 PM GMT. Tools can show multiple timezones simultaneously to find convenient meeting times. Consider standard working hours: 9 AM - 5 PM in each timezone.

What are the major US timezones?

US timezones from east to west: EST/EDT (New York, UTC-5/-4), CST/CDT (Chicago, UTC-6/-5), MST/MDT (Denver, UTC-7/-6), PST/PDT (Los Angeles, UTC-8/-7), AKST/AKDT (Alaska, UTC-9/-8), HST (Hawaii, UTC-10, no DST). Arizona mostly uses MST without DST.

Why do some countries have 30-minute or 45-minute timezone offsets?

Some regions use 30 or 45-minute offsets from UTC for political, geographic, or historical reasons. Examples: India (IST, UTC+5:30), Afghanistan (AFT, UTC+4:30), Nepal (NPT, UTC+5:45), and parts of Australia. These offsets allow finer alignment with local solar time.

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Timezone Converter

To convert timezones, adjust for UTC offset. All timezones are expressed as UTC±hours. EST (UTC-5) + 5 hours = UTC. Add timezone difference: 3 PM EST = 8 PM GMT (5-hour difference). Daylight saving time shifts offsets by 1 hour. Use timezone converters to avoid manual calculation errors.

Convert times between timezones worldwide. Select source and multiple target timezones, see UTC offsets, and handle daylight saving time automatically.

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Source Time

Source Timezone

Date & Time

Your browser timezone: UTC

Target Timezones

Quick Presets

▶North America(0 selected)

▶Europe(1 selected)

▶Asia(1 selected)

▶Australia & Pacific(0 selected)

▶South America(0 selected)

▶Africa & Middle East(0 selected)

▶Other(0 selected)

Selected (2):

LondonTokyo

About Timezone Conversion

All conversions account for Daylight Saving Time (DST) automatically
UTC offsets shown are for the selected date/time
Day indicators (+1/-1) show if the converted time is on a different day
Uses your browser's built-in timezone database (IANA Time Zone Database)

How to Use

Enter your value in the input field
Click the Calculate/Convert button
Copy the result to your clipboard

Frequently Asked Questions

How do I convert time between timezones?: To convert between timezones, adjust for the UTC offset difference. For example, 3:00 PM EST (UTC-5) = 8:00 PM GMT (UTC+0) because EST is 5 hours behind UTC. Add 5 hours: 3 PM + 5 = 8 PM. Always account for daylight saving time changes.
What is UTC and why is it used?: UTC (Coordinated Universal Time) is the primary time standard used worldwide, based at the 0° meridian (Greenwich). It does not observe daylight saving time. All other timezones are expressed as offsets from UTC (e.g., EST is UTC-5, JST is UTC+9). UTC is used in computing, aviation, and scientific applications for consistency.
What is daylight saving time (DST)?: Daylight saving time shifts clocks forward by 1 hour in spring and back in fall to extend evening daylight. Not all regions observe DST. EST becomes EDT (UTC-4) during DST, PST becomes PDT (UTC-7). Timezone converters automatically handle DST transitions based on current dates.
How do I schedule a meeting across timezones?: Use a timezone converter to find overlapping business hours. For example, 2:00 PM EST = 11:00 AM PST = 7:00 PM GMT. Tools can show multiple timezones simultaneously to find convenient meeting times. Consider standard working hours: 9 AM - 5 PM in each timezone.
What are the major US timezones?: US timezones from east to west: EST/EDT (New York, UTC-5/-4), CST/CDT (Chicago, UTC-6/-5), MST/MDT (Denver, UTC-7/-6), PST/PDT (Los Angeles, UTC-8/-7), AKST/AKDT (Alaska, UTC-9/-8), HST (Hawaii, UTC-10, no DST). Arizona mostly uses MST without DST.
Why do some countries have 30-minute or 45-minute timezone offsets?: Some regions use 30 or 45-minute offsets from UTC for political, geographic, or historical reasons. Examples: India (IST, UTC+5:30), Afghanistan (AFT, UTC+4:30), Nepal (NPT, UTC+5:45), and parts of Australia. These offsets allow finer alignment with local solar time.