What makes ClockAndZones different from other time zone converters?

ClockAndZones offers advanced features like historical time zone conversion, future date planning with DST predictions, SmartZone™ technology for instant conversions, and ZoneMatch™ for intelligent meeting planning. Our converter handles complex scenarios like daylight saving changes, timezone rule updates, and business hours overlap calculations.

Can I convert times for past and future dates?

Yes, our advanced converter supports time conversion for any date - past, present, or future. It accurately accounts for historical DST changes, timezone rule modifications, and future DST predictions, ensuring precise conversions across any time period.

How does the international meeting planner work?

Our ZoneMatch™ technology analyzes all participants' time zones and working hours to suggest optimal meeting times. It considers factors like DST changes, business hours overlap, and team availability patterns to find the most convenient meeting slots for everyone.

How accurate is the time zone conversion?

Our conversions are precise to the second, using official IANA timezone database updates. SmartSync™ technology ensures real-time accuracy with automatic DST adjustments and timezone rule updates across all global regions.

Is ClockAndZones suitable for business use?

Absolutely! ClockAndZones is designed for business users with features like team timezone dashboard, business hours overlap calculator, and international meeting planner. It helps global teams coordinate effectively across different time zones.

How do you handle daylight saving time changes?

Our SmartSync™ technology automatically handles all DST changes worldwide. It updates in real-time with the latest timezone rules, considers historical DST patterns, and accurately predicts future changes, ensuring your conversions are always correct.

Clock & Time Zone Converter - Free Online Tools

Convert times across any timezone instantly. Support for historical dates, future planning, and automatic DST handling.

Quick Time Zone Converter

Live World Clock

Popular Conversions

EST → PST3 hours difference

GMT → IST5:30 hours difference

PST → CET9 hours difference

Time Zone Information

North American Time Zones

Complete guide to EST, PST, CST, and MST time zones

Time Zone	Standard Time	Daylight Time
EST/EDT	UTC-5:00	UTC-4:00
CST/CDT	UTC-6:00	UTC-5:00
MST/MDT	UTC-7:00	UTC-6:00
PST/PDT	UTC-8:00	UTC-7:00

European Time Zones

Understanding CET, GMT, and European DST rules

Time Zone	Standard Time	Daylight Time
GMT/BST	UTC+0:00	UTC+1:00
CET/CEST	UTC+1:00	UTC+2:00
EET/EEST	UTC+2:00	UTC+3:00

Business Time Zone Solutions

International Meeting Planning

Find the perfect meeting time across time zones:

New York to London: 5 hours ahead
San Francisco to Tokyo: 16 hours ahead
London to Singapore: 7 hours ahead

Use our converter above for exact times →

Remote Team Management

Manage global team schedules:

Find overlapping work hours
Plan team meetings efficiently
Consider local business hours

Use our converter for team scheduling →

Frequently Asked Questions

How do I convert 3pm EST to PST?

To convert 3pm EST to PST, subtract 3 hours. 3pm EST is 12pm (noon) PST. Use our converter above for exact times.

What time is 9am London in New York?

9am London (GMT/BST) is typically 4am EST in New York. Use our converter above for precise conversions.

How do I handle daylight saving time changes?

Our converter automatically handles DST changes. The converter above will show you the correct time accounting for DST.

Time Zone Resources

Daylight Saving Time

DST moves clocks forward 1 hour in spring and back 1 hour in fall

Business Hours

Standard business hours are typically 9am-5pm in local time

Time Zone Tools

Our time zone converter helps you:

Convert times between any zones
Account for daylight saving time
Plan international meetings
Coordinate global schedules

Try our converter above →