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Time Zone Converter

Convert time between different time zones around the world

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Time Zone Converter Guide: Convert Time Across Regions with DST & Real-Time Updates

Convert time instantly between time zones worldwide—from GMT/UTC to EST/EDT, PST/PDT, CET/CEST, IST, JST, AEST/AEDT, and more. The converter handles daylight saving time (DST) changes, date shifts across the International Date Line, and real-time clock updates for accurate scheduling.

Overview

The Time Zone Converter is essential for global communication, travel planning, and international business. Enter a source time and select one or more destination zones to see the local time, date, and offset—automatically adjusted for DST and regional rules.

Key Features

Global Coverage

  • 200+ time zones & cities across continents.
  • Real-time clock display for each selected zone.
  • Automatic DST adjustments (spring forward / fall back).
  • Multi-zone conversion: compare up to 6 time zones side-by-side.

Smart Features

  • Date awareness: shows when a conversion crosses midnight or the date line.
  • Clear visual offsets (e.g., UTC−5, UTC+1, UTC+9).
  • Quick picks for common zones (e.g., London, New York, Tokyo, Sydney).
  • Mobile-friendly layout for fast checks on the go.

How to Use

Basic Conversion

  1. Set Source Time — choose the starting time and time zone (e.g., 2025-08-18 14:00, London).
  2. Select Targets — pick destination zones (e.g., New York, Tokyo, Sydney).
  3. View Results — see converted local times plus any date differences (yesterday/tomorrow).
  4. Live Updates — times refresh automatically each second.

Advanced Usage

  • Multiple Zones — add up to six destinations to find workable overlaps.
  • Future Planning — set a future date/time to plan events after DST shifts.
  • Meeting Scheduler — scan overlapping business hours to pick the least painful slot.

Popular Time Zones (Examples)

North America

  • ET (EST/EDT) — New York, Toronto, Miami
  • CT (CST/CDT) — Chicago, Dallas, Mexico City
  • MT (MST/MDT) — Denver (Phoenix stays on MST year-round)
  • PT (PST/PDT) — Los Angeles, Seattle, Vancouver

Europe

  • GMT/BST (UK) — London, Dublin
  • CET/CEST — Paris, Berlin, Rome, Madrid
  • EET/EEST — Athens, Helsinki, Bucharest

Asia-Pacific

  • JST (UTC+9, no DST) — Tokyo
  • CST (UTC+8, no DST) — Beijing, Shanghai, Singapore (SGT)
  • AEST/AEDT — Sydney, Melbourne (DST varies by state)
  • IST (UTC+5:30, no DST) — Mumbai, Delhi

Common Use Cases

Business & Work

  • International meetings: convert London ↔ New York ↔ Tokyo in one view.
  • Global teams: coordinate sprints across regions and shifts.
  • Market hours: track NYSE, LSE, TSE, ASX open/close times.
  • Customer support: respond within local business hours.

Travel & Personal

  • Flight planning: check departure vs arrival local times.
  • Event scheduling: publish times with UTC and local equivalents.
  • Family & friends: stay in sync across continents.
  • Sports & TV: convert broadcast times to your zone.

Understanding Time Differences

Time Offset Examples (Standard Time)

Assume New York (EST, UTC−5) as source at 12:00: | From New York (EST) | To Zone | Local Time | Difference | |---|---|---|---| | 12:00 | Los Angeles (PST, UTC−8) | 09:00 | −3 hours | | 12:00 | London (GMT, UTC±0) | 17:00 | +5 hours | | 12:00 | Tokyo (JST, UTC+9) | 02:00 (next day) | +14 hours | | 12:00 | Sydney (AEST, UTC+10) | 03:00 (next day) | +15 hours |

Note: During daylight time (EDT/PDT/AEDT etc.), offsets change.
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International Date Line

  • Crossing the Pacific can flip the calendar date.
  • The converter labels Yesterday/Today/Tomorrow to avoid confusion.

Daylight Saving Time (DST)

Key Points

  • Spring forward: clocks move +1 hour at local transition.
  • Fall back: clocks move −1 hour; one hour repeats.
  • Not universal: many regions do not observe DST.
  • Different calendars: start/end dates vary by country/state.

Typical Schedules (subject to local law)

  • North America: second Sunday in March → first Sunday in November.
  • Europe: last Sunday in March → last Sunday in October.
  • Australia (parts): first Sunday in October → first Sunday in April (e.g., NSW/VIC/ACT/TAS; QLD/NT/WA no DST).

Always verify with the converter for the specific year and region.

Tips for Global Scheduling

Best Practices

  • Use UTC in invites plus each attendee’s local time.
  • Confirm DST status for all participants.
  • Double-check the exact time zone (e.g., “Europe/London” vs “UTC+1”).
  • Add a buffer around meetings near DST changeovers.

Meeting Planning Workflow

  1. Find overlap of standard business hours.
  2. Rotate times to share inconvenience fairly.
  3. Record sessions and share notes for those outside overlap.
  4. Include time zones and UTC in calendar invites.

Business Hours (Standard-Time Reference)

| City | Local Business Hours | UTC Equivalent* | |---|---|---| | New York (EST) | 09:00–17:00 | 14:00–22:00 | | London (GMT) | 09:00–17:00 | 09:00–17:00 | | Tokyo (JST) | 09:00–17:00 | 00:00–08:00 | | Sydney (AEST) | 09:00–17:00 | 23:00–07:00 (prev → next day) |

* During daylight time, these windows shift (e.g., EDT, BST, AEDT). Use the converter’s future date to see exact hours.

Mobile & Travel Tips

For Travellers

  • Set multiple clocks (home & destination).
  • Verify flight times are in local airport time.
  • Plan jet lag: adjust sleep gradually pre-trip.
  • Enable automatic time zone on devices.

For Remote Work

  • Team calendars that show multiple time zones.
  • Status message with your local time.
  • Prefer UTC when sharing deadlines.
  • Always include the time zone in documentation.

Quick FAQs

What’s the difference between GMT and UTC?
UTC is the global standard; GMT is a time zone (UK winter time). In summer, the UK uses BST (UTC+1).

Why do my conversions change in March/October?
DST starts/ends on different dates by region. Use the converter with the target date set to your event.

What if a city doesn’t observe DST (e.g., Phoenix, AZ)?
Those locations remain on standard time year-round, so their offset relative to other cities shifts when others change.

How big is the New York ↔ Sydney offset?

  • EST (UTC−5) → AEST (UTC+10): +15 hours.
  • EST (UTC−5) → AEDT (UTC+11): +16 hours.
  • EDT (UTC−4) → AEST (UTC+10): +14 hours.
  • EDT (UTC−4) → AEDT (UTC+11): +15 hours.

Start converting world time zones today—plan international meetings, travel, and global events with confidence using the Time Zone Converter’s real-time, DST-aware results.