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World Clock

A tool for checking current time in major cities worldwide in real-time.

🌍 World Clock

Check current time in major cities around the world

현재 시각: 오후 4:59:48

🇰🇷서울
01:59:48
2025. 11. 24. (월)
서울 기준
🇯🇵도쿄
01:59:48
2025. 11. 24. (월)
서울 기준
🇨🇳베이징
24:59:48
2025. 11. 24. (월)
서울 -1시간
🇺🇸뉴욕
11:59:48
2025. 11. 23. (일)
서울 -14시간
🇺🇸로스앤젤레스
08:59:48
2025. 11. 23. (일)
서울 -17시간
🇬🇧런던
16:59:48
2025. 11. 23. (일)
서울 -9시간
🇫🇷파리
17:59:48
2025. 11. 23. (일)
서울 -8시간
🇩🇪베를린
17:59:48
2025. 11. 23. (일)
서울 -8시간
🇦🇺시드니
03:59:48
2025. 11. 24. (월)
서울 +2시간
🇦🇪두바이
20:59:48
2025. 11. 23. (일)
서울 -5시간
🇸🇬싱가포르
24:59:48
2025. 11. 24. (월)
서울 -1시간
🇭🇰홍콩
24:59:48
2025. 11. 24. (월)
서울 -1시간

💡 사용 팁

  • ⏰ 실시간으로 세계 각 도시의 현재 시간을 표시합니다
  • 🌅 배경색으로 낮/밤을 구분합니다 (낮: 밝음, 밤: 어두움)
  • 🕐 서울 시간 기준으로 시차를 표시합니다
  • 📅 날짜와 요일도 함께 표시됩니다

Key Features​

  • ⏰ Real-time updates (every second)
  • 🌍 Display 12 major cities simultaneously
  • 🌅 Visual day/night distinction
  • 🕐 Time difference from Seoul
  • 📅 Display date and day of week

Supported Cities​

🌏 Asia​

  • 🇰🇷 Seoul (Asia/Seoul) - Reference
  • 🇯🇵 Tokyo (Asia/Tokyo) - +0 hours
  • 🇨🇳 Beijing (Asia/Shanghai) - -1 hour
  • 🇭🇰 Hong Kong (Asia/Hong_Kong) - -1 hour
  • 🇸🇬 Singapore (Asia/Singapore) - -1 hour
  • 🇦🇪 Dubai (Asia/Dubai) - -5 hours

🌍 Europe​

  • 🇬🇧 London (Europe/London) - -9 hours (GMT)
  • 🇫🇷 Paris (Europe/Paris) - -8 hours
  • 🇩🇪 Berlin (Europe/Berlin) - -8 hours

🌎 Americas​

  • 🇺🇸 New York (America/New_York) - -14 hours (EST)
  • 🇺🇸 Los Angeles (America/Los_Angeles) - -17 hours (PST)

🌏 Oceania​

  • 🇦🇺 Sydney (Australia/Sydney) - +1 hour

Use Cases​

1. International Collaboration 🤝​

Situation: Schedule meeting with US East Coast team
→ Check New York time
→ Seoul 10 AM = New York 8 PM (previous day)
→ Choose appropriate meeting time

2. Travel Preparation ✈️​

Situation: Call family in Korea while traveling in Paris
→ Check Paris time
→ 8-hour difference with Korea
→ Paris noon = Seoul 8 PM

3. Watch Global Events 📺​

Situation: Watch Super Bowl live from US
→ Check US time
→ Calculate broadcast time
→ Adjust early morning schedule

4. Stock/Crypto Trading 💰​

Situation: Check US/Europe market opening times
→ New York market opens: Korea time 23:30
→ London market opens: Korea time 17:00

Understanding Time Differences​

Daylight Saving Time (DST)​

Some countries advance clocks by 1 hour in summer.

  • Applied Countries: US, most of Europe
  • Period: March ~ November (varies by country)
  • Impact: Time difference reduces by 1 hour

Standard Time Zones​

GMT (Greenwich Mean Time) - London, UK reference
UTC (Coordinated Universal Time) - International standard
KST (Korea Standard Time) - Korea Standard Time (UTC+9)

Time Difference Calculation Tips​

East → West​

  • Time slows down (minus)
  • Seoul → New York: -14 hours
  • Date may go back one day

West → East​

  • Time speeds up (plus)
  • New York → Seoul: +14 hours
  • Date may go forward one day

International Date Line​

  • Imaginary line through center of Pacific Ocean
  • Date changes by one day when crossing the line
  • Seoul → Los Angeles travel: Same day twice!

Usage Tips​

💡 Tip 1: Meeting Schedule​

When meeting with overseas teams, check if both sides are within working hours.

Good Time:

  • Seoul 9 AM = New York 7 PM ❌ (after US work hours)
  • Seoul 10 AM = London 2 AM ❌ (early morning)
  • Seoul 6 PM = London 10 AM ✅

💡 Tip 2: Phone Etiquette​

When calling overseas friends/family from Korea:

  • Avoid early morning/late night
  • Local lunch/dinner time appropriate

💡 Tip 3: Online Events​

Time confirmation essential when participating in global events like games, webinars!

Frequently Asked Questions​

Q: Is daylight saving time automatically applied?​

A: Yes! Automatically applied using browser's time zone information.

Q: Can I add more cities?​

A: Currently supports 12 major cities only. Customization feature planned for future.

Q: What's the day/night distinction criteria?​

A: 6 AM ~ 6 PM is distinguished as day.

Q: Is the time accurate?​

A: Based on user's computer time, so computer time must be accurate.

Q: Can I view past/future times?​

A: Current version supports real-time only. Time calculation feature planned for future.

Reference Information​

Time Differences from Korea to Major Cities​

CityDifferenceExample (Seoul 12:00)
Tokyo0 hours12:00
Beijing-1 hour11:00
Singapore-1 hour11:00
Dubai-5 hours07:00
London-9 hours03:00
Paris-8 hours04:00
New York-14 hours22:00 (previous day)
LA-17 hours19:00 (previous day)
Sydney+1 hour13:00

Time Zone Abbreviations​

  • KST: Korea Standard Time (Korea)
  • JST: Japan Standard Time (Japan)
  • CST: China Standard Time (China)
  • GMT: Greenwich Mean Time (UK)
  • EST: Eastern Standard Time (US East)
  • PST: Pacific Standard Time (US West)
  • AEST: Australian Eastern Standard Time (Australia)

Browser Support​

  • ✅ Chrome 90+
  • ✅ Firefox 90+
  • ✅ Safari 14+
  • ✅ Edge 90+
  • ✅ Mobile browsers

Check worldwide time at a glance, start now! 🌍⏰

💬 Was this tool helpful?​

Feel free to send us your feedback or suggestions anytime!

Privacy​

  • ✅ 100% client-side processing
  • ✅ No data sent to server
  • ✅ Uses local system time
  • ✅ Works offline