World Clock
Your Local Time
03:54:34 PM
Friday, February 20, 2026
About World Clock
The World Clock displays current time in major cities around the world in real-time. Perfect for international business, travel planning, coordinating meetings across time zones, and staying connected with friends and family worldwide.
Features:
- Real-time updates every second
- 12 major cities across different time zones
- Shows current time, date, and timezone abbreviation
- Automatically adjusts for daylight saving time
- Clean, easy-to-read display
Common Uses:
- Schedule international meetings and calls
- Plan travel across multiple time zones
- Coordinate with remote teams worldwide
- Check if it's a good time to contact someone abroad
- Monitor global markets and trading hours
How It Works
A world clock displays current time across multiple timezones simultaneously, enabling international coordination and time comparison. The system obtains the current time in UTC (Coordinated Universal Time) from the device clock, then calculates local time for each timezone by applying timezone offsets. Each timezone has a fixed UTC offset (e.g., EST is UTC-5, JST is UTC+9) plus potential daylight saving time (DST) adjustments. Modern implementations use the IANA timezone database (tz database), which contains historical and current timezone rules for hundreds of locations worldwide. The algorithm determines whether a location observes DST at the current date, applies appropriate offset adjustments, and formats the result according to local conventions (12-hour vs 24-hour, date format). Advanced world clocks offer timezone conversion: select a time in one timezone, and the tool calculates equivalent times in other zones. This involves converting the source time to UTC (subtracting offset), then converting UTC to each target timezone (adding their offsets). The system must handle edge cases like DST transitions (spring forward, fall back), timezone boundaries that don't align with political borders, and historical timezone changes. Real-time clocks update every second to display live time, using JavaScript setInterval or requestAnimationFrame for smooth updates.
Use Cases
1. International Business & Meetings
Schedule meetings across global teams by comparing working hours in different timezones. Find meeting times that are reasonable for all participants (avoiding midnight for some while others have midday). Remote companies rely on world clocks to coordinate team members in New York, London, Singapore, and Sydney without timezone math errors.
2. Travel Planning & Coordination
Check destination time before flights to plan arrivals and avoid jet lag confusion. Travelers coordinate pickup times, hotel check-ins, and tour bookings by converting between home and destination timezones. World clocks help calculate "what time will it be there when I land" for international flights.
3. Remote Team Collaboration
Distributed teams check colleagues' local times before sending messages or scheduling calls. Avoid contacting team members during their off-hours. World clocks make it easy to see which team members are currently in working hours, enabling respectful asynchronous communication.
4. Event Broadcasting & Live Streams
Content creators determine broadcast times that maximize global audience reach. Convert event times to multiple zones for marketing ("Starts at 2 PM EST / 11 AM PST / 7 PM GMT"). Sports fans check match times in their local timezone when events are scheduled in foreign countries.
5. Stock Trading & Financial Markets
Monitor global market open/close times (NYSE, LSE, Tokyo Stock Exchange) across timezones. Traders coordinate with international markets and time trades for optimal execution. Financial professionals track trading hours in different regions to manage global portfolios.
6. Customer Support & Operations
24/7 support teams coordinate shift handoffs across timezone-distributed offices. Support managers determine coverage gaps and schedule staff to ensure round-the-clock availability. Operations teams monitor service incidents across regions by converting reported times to UTC.
Schedule meetings across global teams by comparing working hours in different timezones. Find meeting times that are reasonable for all participants (avoiding midnight for some while others have midday). Remote companies rely on world clocks to coordinate team members in New York, London, Singapore, and Sydney without timezone math errors.
2. Travel Planning & Coordination
Check destination time before flights to plan arrivals and avoid jet lag confusion. Travelers coordinate pickup times, hotel check-ins, and tour bookings by converting between home and destination timezones. World clocks help calculate "what time will it be there when I land" for international flights.
3. Remote Team Collaboration
Distributed teams check colleagues' local times before sending messages or scheduling calls. Avoid contacting team members during their off-hours. World clocks make it easy to see which team members are currently in working hours, enabling respectful asynchronous communication.
4. Event Broadcasting & Live Streams
Content creators determine broadcast times that maximize global audience reach. Convert event times to multiple zones for marketing ("Starts at 2 PM EST / 11 AM PST / 7 PM GMT"). Sports fans check match times in their local timezone when events are scheduled in foreign countries.
5. Stock Trading & Financial Markets
Monitor global market open/close times (NYSE, LSE, Tokyo Stock Exchange) across timezones. Traders coordinate with international markets and time trades for optimal execution. Financial professionals track trading hours in different regions to manage global portfolios.
6. Customer Support & Operations
24/7 support teams coordinate shift handoffs across timezone-distributed offices. Support managers determine coverage gaps and schedule staff to ensure round-the-clock availability. Operations teams monitor service incidents across regions by converting reported times to UTC.
Tips & Best Practices
• Always confirm timezone abbreviations - PST can mean Pacific Standard or Philippine Standard Time
• Use city names instead of abbreviations to avoid ambiguity (Los Angeles vs just "PST")
• Remember DST transitions change offsets twice yearly - verify current vs standard offset
• For recurring meetings, pick times that work year-round (accounting for DST changes)
• Convert critical times to UTC first, then to target timezones to avoid conversion errors
• Consider using 24-hour time format to prevent AM/PM confusion in international contexts
• Account for timezone changes during travel - your device should auto-update, but verify
• When scheduling, explicitly state timezone (e.g., "3 PM EST") to prevent misunderstandings
• Use city names instead of abbreviations to avoid ambiguity (Los Angeles vs just "PST")
• Remember DST transitions change offsets twice yearly - verify current vs standard offset
• For recurring meetings, pick times that work year-round (accounting for DST changes)
• Convert critical times to UTC first, then to target timezones to avoid conversion errors
• Consider using 24-hour time format to prevent AM/PM confusion in international contexts
• Account for timezone changes during travel - your device should auto-update, but verify
• When scheduling, explicitly state timezone (e.g., "3 PM EST") to prevent misunderstandings