🌍 Time Zone Converter
Convert times between different time zones with automatic daylight saving time adjustments, major city support, and comprehensive scheduling assistance for international meetings and travel planning.
🕐 Convert Time Zones
Convert time between different time zones:
🌍 Understanding Time Zones
Time zones divide the world into regions where the same standard time is used. Our converter handles complex timezone calculations including daylight saving time adjustments.
🕐 Time Zone Basics
🌍 UTC Standard
Coordinated Universal Time
Global time standard
Zero offset reference
No daylight saving
🕐 Offset System
Hours ahead/behind UTC
15° longitude per hour
24 time zones worldwide
Some zones have half-hour offsets
☀️ Daylight Saving
Summer time adjustment
Typically 1 hour forward
Spring forward, fall back
Not used everywhere
🌆 International Date Line
180° meridian
Date changes here
24-hour time difference
Complex crossing rules
🗺️ Major Time Zones
🇺🇸 Eastern Time (ET)
UTC-5 (EST), UTC-4 (EDT)
New York, Toronto, Miami
Financial markets hub
Business hours: 9 AM - 5 PM
🇬🇧 Greenwich Mean Time (GMT)
UTC+0
London, Dublin, Lisbon
World time reference
No daylight saving in some areas
🇯🇵 Japan Standard Time (JST)
UTC+9
Tokyo, Osaka, Kyoto
No daylight saving
Early business hours
🇦🇺 Australian Eastern Time (AET)
UTC+10 (AEST), UTC+11 (AEDT)
Sydney, Melbourne
Summer daylight saving
Opposite season to Northern Hemisphere
📅 Daylight Saving Time
🌅 Spring Forward
Clocks move forward 1 hour
Usually March/April
Gains an hour of daylight
Can cause scheduling confusion
🌆 Fall Back
Clocks move back 1 hour
Usually October/November
Loses an hour of daylight
Creates extra hour
🌍 Global Variations
Not used in all countries
Different start/end dates
Some places abandoned it
Political debates ongoing
🕐 Meeting Planning
Check DST transitions
Avoid confusion dates
Use UTC for international
Confirm with all parties
💼 Business Applications
📊 International Meetings
Global team coordination
Client calls across time zones
Project deadline calculations
24/7 operations scheduling
✈️ Travel Planning
Flight arrival times
Hotel check-in coordination
Tour schedule planning
Jet lag calculations
📈 Financial Markets
Trading hours coordination
Market opening/closing times
Global economic events
Currency trading windows
🌐 Software Development
Distributed team standups
Release deployment timing
Global user support
Server maintenance windows
💡 Time Zone Tip: When scheduling international meetings, consider using UTC (Coordinated Universal Time) as a neutral reference point to avoid confusion with local time zones and daylight saving time changes.
🕐 Time Zone Mathematics
🔢 Offset Calculations
Convert to UTC first
Add/subtract offset hours
Handle minute differences
Account for DST transitions
📅 Date Line Crossings
24-hour difference
Date changes unexpectedly
Calendar date adjustments
Week/month boundary issues
⏰ Precision Requirements
Millisecond accuracy
Unix timestamp standard
JavaScript Date object
Timezone library benefits
🔄 Conversion Algorithms
Source to UTC conversion
UTC to target conversion
DST rule application
Historical timezone changes
🌐 Global Time Standards
🕐 UTC (Universal Time)
Primary time standard
Atomic clock accuracy
No leap seconds added
Scientific and technical use
📻 Radio Time Signals
WWV, WWVH broadcasts
Precise time distribution
Used by navigators
Amateur radio enthusiasts
🛰️ GPS Time
Separate from UTC
No leap seconds
Atomic clock precision
Navigation systems
⏰ Local Time Zones
Legal and social standard
Cultural variations
Political boundaries
Daylight saving policies
⚠️ Common Time Zone Pitfalls
📆 DST Transitions
Spring forward hour loss
Fall back hour duplication
Missed meetings
Scheduling conflicts
🌍 Political Changes
Timezone boundary changes
Country policy shifts
Historical adjustments
Software update requirements
🕐 Ambiguous Times
Fall DST transition
Clock moving backward
Which hour is which?
Meeting scheduling issues
📊 Calendar Complications
Month length variations
Leap year adjustments
Holiday scheduling
Business day calculations