Convert Time Between Any Zones

A time zone is a region of the globe that observes a uniform standard time for legal, commercial, and social purposes. The world is divided into 24 main time zones, each roughly 15 degrees of longitude wide, corresponding to a one-hour difference in solar time.

Time zones were created to standardize timekeeping across different regions, as before their establishment, each town or city would set its clocks based on local solar time. This system became crucial with the development of railways and telegraph systems in the 19th century.

Today, most time zones are defined relative to Coordinated Universal Time (UTC), with some regions observing daylight saving time during certain months of the year.

Our converter uses your selected time and time zones to calculate the correct local time in another region, accounting for daylight saving time changes and other local time variations. We use the latest IANA Time Zone Database to ensure accuracy.

The process works by:

• Converting your input time to UTC: We first convert your selected time to Coordinated Universal Time (UTC) using the source timezone's current offset.
• Applying the target timezone: We then apply the target timezone's current offset to the UTC time to get the local time.
• Handling DST automatically: Our system automatically accounts for daylight saving time transitions, ensuring accuracy even during seasonal changes.
• Real-time updates: The converter updates in real-time as you change inputs, providing instant results.

We sync with official time zone data sources to ensure our conversions remain accurate even when governments change their time zone rules.

The difference in hours between time zones is due to the Earth's rotation and the way time zones are set by countries and regions. Some regions may have fractional hour differences (like 30 or 45 minutes) from UTC due to historical or geographical reasons.

Common fractional time zones include:

• India (UTC+5:30): 30 minutes ahead of standard UTC+5
• Nepal (UTC+5:45): 45 minutes ahead of UTC+5
• Iran (UTC+3:30): 30 minutes ahead of UTC+3
• Afghanistan (UTC+4:30): 30 minutes ahead of UTC+4
• Myanmar (UTC+6:30): 30 minutes ahead of UTC+6

These fractional offsets were often chosen for political, geographical, or historical reasons rather than strict adherence to the 15-degree longitude rule.

Daylight Saving Time is the practice of advancing clocks during summer months to extend evening daylight. Typically, clocks are moved forward by one hour in spring ("spring forward") and back by one hour in fall ("fall back"). Our converter automatically accounts for DST changes in all supported regions.

Key DST Facts:

• Not universal: Only about 70 countries observe DST
• Different dates: Countries change their clocks on different dates
• Energy debate: Modern studies question the energy-saving benefits
• Health impact: Clock changes can disrupt sleep patterns and circadian rhythms

Some regions like Arizona (except Navajo Nation), Hawaii, and most of Asia don't observe DST at all.

GMT (Greenwich Mean Time) is a time zone used in some countries, while UTC (Coordinated Universal Time) is the primary time standard by which the world regulates clocks. For most practical purposes, UTC and GMT are equivalent, but UTC is the modern scientific standard that replaced GMT.

Key Differences:

• GMT: Based on Earth's rotation relative to the sun, can vary slightly
• UTC: Based on atomic clocks, extremely precise and stable
• Usage: UTC is used for scientific and technical applications
• Leap seconds: UTC occasionally adds leap seconds to stay synchronized with Earth's rotation

In everyday use, the difference is negligible (less than 0.9 seconds), so they're often used interchangeably.

For a detailed technical explanation of these differences and when to use each standard, read our comprehensive guide: UTC vs GMT: Key Differences Explained.

If your conversion seems incorrect, check if both locations might be in a DST transition period. Also, verify you've selected the correct cities and date, as some places change their time zone rules occasionally. If you still have issues, please contact us for assistance.

Common troubleshooting steps:

• Check the date: DST transitions can affect the time difference
• Verify locations: Make sure you've selected the correct cities
• Consider recent changes: Some countries occasionally change their time zone rules
• Browser timezone: Ensure your device's timezone is set correctly

TimeZonder uses the official IANA Time Zone Database (also known as the Olson database), which is the same data source used by major operating systems, programming languages, and applications worldwide.

Our accuracy features:

• Real-time updates: We regularly sync with the latest timezone data
• Historical accuracy: Correct conversions for past and future dates
• DST handling: Automatic daylight saving time calculations
• Government changes: Updates when countries modify their timezone rules

Our conversions are accurate to the second and account for all official timezone changes and DST transitions.

While TimeAndDate and Time.is are established timezone tools, TimeZonder offers several unique advantages designed for modern users who need fast, accurate, and intuitive timezone conversion.

TimeZonder's key advantages:

• Faster interface: Our streamlined design loads instantly and provides immediate results without page refreshes or complex navigation
• Modern UX: Clean, mobile-first design optimized for today's devices with intuitive touch interactions and responsive layouts
• Real-time updates: Live world clocks and instant conversion updates as you type, eliminating the need to reload or refresh
• Meeting-focused tools: Purpose-built meeting planner with business hours visualization and calendar integration designed for remote teams
• Simplified workflow: Fewer clicks to get results - no complex menus or multiple pages to navigate through
• Offline capability: Works without internet connection for basic conversions once loaded, perfect for travelers

What makes us different:

• Focus on speed: TimeAndDate can feel overwhelming with ads and multiple features - we prioritize fast, focused timezone conversion
• Modern technology: Built with current web standards for optimal performance across all devices
• User experience: Designed specifically for remote workers, travelers, and international teams who need quick, reliable results
• No distractions: Clean interface without overwhelming ads or complex menus that slow down your workflow

While other tools offer extensive features, TimeZonder focuses on doing timezone conversion exceptionally well with a modern, fast, and user-friendly approach. Try both and see which workflow feels more natural for your needs!

Absolutely! TimeZonder is designed with business users in mind. Our Meeting Planner tool helps you find optimal meeting times across multiple time zones and can integrate with popular calendar applications.

Business features include:

• Meeting Planner: Find optimal times for multiple participants
• Business hours visualization: See when participants are likely to be working
• Calendar integration: Export to Google Calendar, Outlook, and Apple Calendar
• Sharing tools: Easy sharing of meeting times with colleagues
• Multiple timezone support: Add unlimited participant locations

Many remote teams and international businesses rely on TimeZonder for scheduling coordination.

Yes! TimeZonder is completely free to use. All our core features including time conversion, world clocks, meeting planning, and time difference calculations are available at no cost.

What's included for free:

• Unlimited conversions: Convert between any time zones as many times as you need
• All tools: Access to converter, world clocks, meeting planner, and time difference calculator
• No registration required: Use all features without creating an account
• Mobile friendly: Full functionality on all devices
• No ads interruption: Clean, focused experience

We believe accurate time zone conversion should be accessible to everyone. If you find TimeZonder helpful, consider supporting us through our Ko-fi link!

TimeZonder has limited offline functionality. Basic time conversions will work offline once the page is loaded, but some features require an internet connection for optimal performance.

Offline capabilities:

• Basic conversions: Convert between previously loaded time zones
• World clocks: Display current time for cached locations
• Cached data: Recently used cities and time zones remain available

Requires internet:

• New city searches: Adding cities not previously loaded
• Timezone updates: Latest DST and timezone rule changes
• Calendar integration: Exporting meetings to calendar apps

For best results, we recommend using TimeZonder with an internet connection.